Problem 1 . PREVIEW ONLY -- ANSWERS NOT RECORDED (1 point) Suppose C(r) is the total cost of paying off a car loan borrowed at an annual interest rate of r%. (a) What are the units of C(r)? Remaining time: 87:29 (min: dollars 0 percent dollars/percent percent/dollars (b) What are the units of C'(r)? dollars percent 0 dollars/percent percent/dollars (b) What is the sign of C'(r)? positive 0 negative need more information Problem 2. PREVIEW ONLY -- ANSWERS NOT RECORDED (1 point) Consider the function f(x) shown in the graph below. (Note that you can click on the graph to get a larger version of it, and that it may be useful to print that larger version to be able to work with it by hand.) Carefully sketch the derivative function of the given function (you will want to estimate values on the derivative function at different )6 values as you do this). Use your derivative function graph to estimate the following values on the derivative function. at x = -3 -1 1 3 the derivative is (1 point) If f(x) = cos(sin(x2)), find f'(x). 0 Find f' (4). Note: You can earn partial credit on this problem. Find the formula for the graph of the function f (x) given in the graph above. f(x) = 0 2/7 2/7