(federal income taxes and piecewise functions mc) determine f(−2) for a piecewise function f of x in three pieces. the function is defined by part 1, which is x cubed for x less than negative 3, part 2, which is 2 times x squared minus 9 for negative 3 is less than or equal to x which is less than 4, and part 3 which is 5 times x plus 4, for x greater than or equal to 4. −1 −6 8 9