Susan lives on an island economy and consumes only coconuts. Her utility function is given by u = √C, where is the number of coconuts she consumes. a. Find her utility from consuming 17 coconuts. Do not include the label in your answer; just give the number. Round your answer to the first decimal point. b. Find her marginal utility of consuming her 17th coconut. Do not include the label in your answer; just give the number. Round your answer to the first decimal point.