1. Suppose that V(t) = 24 . 1.07 + 6 sin(t) represents the value of a person's investment portfolio in thousands of dollars in year t, where t = 0 corresponds to January 1, 2010. a. At what instantaneous rate is the portfolio's value changing on January 1, 2012? Include units on your answer. b. Determine the value of V"(2). What are the units on this quantity and what does it tell you about how the portfolio's value is changing? c. On the interval 0