"What effect will a price ceiling imposed by the goveenment have on the supply of farms producing wheat?"

A shortage of supply

shortage of supply

any ceiling that is suspended below the original ceiling usually to conceal an ugly, or too high ceiling or to install flourescents with translucent panels to give the effect of the entire ceiling being lit up. lots of reasons and methods but basically is just a 2nd ceiling concealing the original.

yes, you can paint ceiling tiles. We have done it many times. Painting may effect their UL listing however.