b. Given the configuration as specified in Problem 4.a, assume that old_value 245 and CCPR2 is 4745 when it enters the interrupt subroutine below. What is the frequency of the input signal on CCP2 pin (RC1)? void interrupt interrupt_handler(void) static unsigned int old value; if(CCP2IFs= 1) period CCPR2 - old_value; // Calculate measured period, which is a global unsigned int old_value CCPR2; CCP2 IF = 0; U // Update "old value" // Be sure to relax the CCP2 interrupt before returning Hz