Please do a, b, and c.

3) Write the following functions using CCS C to complete the code framework below. You do not have to compile this code but your code must be typed to be graded. (20 pts) (a) A function setupP2_P3() that selects P3.7-4 for digital IO with those bits set as outputs and selects P2.7-4 for digital IO with those bits set as inputs. The inputs P2.7-4 are connected to external switches and require internal pull-down resistors When the switch is open, a logic 0 is input and when the switch is closed, a logic 1 is input. None of the settings for P2 or P3 should be altered. Default drive strength is fine. (b) A function in2_out3() that reads in from P2.7-4 to determine which switches are open and which are closed. The function then outputs a logic 1 on P3.7-4 if the switch on the correspond port 2 input is closed and a logic 0 if it is open (i.e. P2 pin 4 input corresponds to P3.4 output, P2.5 P3.5, etc.) (c) Write a simple main() that sets up any variables and shows how your functions would be used. What value would result in P3OUT in your in2_out3() function if P21N-0xB4? If P21N-0x8F? Does it matter what the values of P3IN or P2OUT are? Explain