I am quite aware, but you're simulataneously claiming that you would introduce technologies that you then claim are in evidence at the time. How you can handle such cognitive dissonance, I have no idea.
There is no cognitive dissonance. There are, however, measurement uncertainties. We haven't specified
where exactly I am to go, nor
when exactly. The OP specified "about 5000 years ago", which taken literally would have me arriving at 2993 BCE -- but where? And what's the margin of error?
Similarly, we don't know exactly when various technologies were developed.According to the best estimates I've been able to find, the introduction of the ox-drawn plough occurred at "about 3000 BCE," but of course, that could mean any time within a century or so of that time. The arrival of the wheel also happened at "about 3000BCE," while the ox-drawn cart is believed to have occurred at "about 2800BCE." Again, what's the margin of error? If I arrive in 2993BCE, and the ox-drawn plough was actually invented in 2991BCE, I've got two years to develop a prototype and amaze the natives....
There's a good sporting chance I would arrive early enough to be able to "invent" all three devices. The chances are excellent that I would arrive early enough to invent one of them (since I'm expected to have a two-hundred year head start on the ox-drawn cart.)
The time-table looks like this. Oxen, as draft beasts, are available as early as 4000 BCE. By the time I arrive at ca. 3000 BCE, they're (assuming I visit Mesopotamia) well-established and omnipresent, but they're most commonly used for pulling sledges, not wheeled carts. The wheel and axel are, if present at all, only experimental devices used on a local scale, and no one has managed to put the two together.
Similarly, bread (and flour) have been around for a long time, but are made laboriously by hand. Local masons have long been able to cut stone well for a long time -- but few if any have thought to cut a pair of millstones and balance them to grind. Even when that is done, there's still a several hundred year gap before anyone will think of using ox-power, water-power, or wind-power to drive the mill instead of driving it laboriously by hand.
Pottery has been around for a long time, but it's still made either by coils or slabs; the potter's wheel is coming in at about this time; the pulley driven wheel will not be available for centuries because pulleys will not be available for that time.
So it really depends on when I arrive. I will almost certainly arrive before the invention of the ox-drawn cart or the water-driven mill, since I've got a two century head start. If the ox-drawn plough and the wheeled cart has already been invented in the village where/when I arrive, I simply show the locals how to put that together. On the other hand, If they haven't discovered them, I can show them the pieces they need, using the technology they already have (the ox-collar for the sledge, in particular.) They already know how to cut smooth stones, and the idea of cutting a large smooth stone and using it to grind grain may or may not have occurred to them -- but the idea of driving such a large, smooth, stone using water power will probably not occur to them for 200 years.