write an avr c program that reads debounced switch presses, and display results to two digit seven-segment displays connected to port a (lower digit) and port c (upper digit). your program should display the switch number to the lower digit display when you pressed a switch and shift the previous displayed value to the left (upper digit). for example if you press 5, 2, 3 in sequence, your display will change from 00 to 05, 52, and 23 in sequence.