Find the average value and the value(s) of c guaranteed by the mean value theorem for integrals if f(x) = 2x2 -3x over the interval [ - 1,2]. a.) favg O - 3+ 121 C= 4 b.) favg 7 O C = 3+ 121 4 c.) favg N/ - O - 3+ 1 13 C= 4 d.) favg = 2 O C = 3+ V 13 4