the programming language is C

Groups E, F, G, H: Write a program that reads a numeric keypad (such as the pad on an older telephone) and lights one of ten LEDs appropriately. If no key is pressed, no LED sould light. If the user presses a key that is not a number, you may handle the situation in any way you feel appropriate. The keypad uses a row and column format, in which pushing a button connects one of the column wires to one of the row wires. You will need to use a scanning technique to determine which key has been pressed, in which you successively activate one column at a time and read the output on each row. Pull down resistors will be needed on your inputs. The program should have a while (1) loop so that it repeatedly reads the keypad and lights one of the LEDs. Groups E, F, G, H: Write a program that reads a numeric keypad (such as the pad on an older telephone) and lights one of ten LEDs appropriately. If no key is pressed, no LED sould light. If the user presses a key that is not a number, you may handle the situation in any way you feel appropriate. The keypad uses a row and column format, in which pushing a button connects one of the column wires to one of the row wires. You will need to use a scanning technique to determine which key has been pressed, in which you successively activate one column at a time and read the output on each row. Pull down resistors will be needed on your inputs. The program should have a while (1) loop so that it repeatedly reads the keypad and lights one of the LEDs