The microcontroller in Section 9.3 receives decimal numbers on its serial port. Each number consists of two digits encoded as ASCII characters. In order to distinguish between successive 2-digit numbers, a delimiter character H is used. Thus, if two successive numbers are 43 and 28, the received sequence will be H43H28. Each number is to be displayed on two 7-segment displays connected to parallel ports A and B. The delimiter character should not be displayed. The displayed number should change only when both digits of the next number have been received. Show the connections needed to accomplish this function. Label the segments of the display unit as indicated in Figure A.33. Write a C-language program to perform the required task. Use polling to detect the arrival of each ASCII character.