16. Answer "T" (for "True" ) if the given assertion is always true. Otherwise, answer "F" (for "False" ). (a) For the future value S of an ordinary annuity consisting of n > 2 payments of an amount R > 1 with periodic interest rate r > 0, we have that n = In (Sr + R) - In(R) In(1 +r) (b) If h is a function defined for all positive real numbers and h'(x) = In(x) for all x > 0 and h(e) = 1, then h(1) = 0. 600 (c) If a demand equation is p = 39 + 1 where q > 0 is quantity, then demand is elastic at q = 10. (d) If a > 1 is a constant and f(x) = 5x3 + In(ax), then f'(-1) = 14. (e) The function f(x) = x4 -2x2 -3 is increasing on the interval (1, 2)