Assume the size of a tumor t days after a dose of chemotherapy was administered is given by V(t) = 0.286e-0-41t + 0.007e If the second dose should be given when the tumor starts to regrow, after how many days should the second dose be given? a) Between 1 and 3 days after treatment b) Between 7 and 9 days after treatment c) Between 9 and 11 days after treatment d) Between 3 and 5 days after treatment