pls help me answer 2-4

Question 2 A company should never price a product below full cost. True False D Question 3 A demand function is the relation between price and quantity demanded. True False D Question 4 An annuity is the time period in which the cash flows paid out for an investment will be recovered. O a series of equal payments. necessary in order to calculate the net present value. used to calculate depreciation in order to provide a tax shield