The company / institution you have worked for complains about the high incoming electricity bills and asks you to write a program that approximately calculates the monthly and annual active energy consumption (only watt) costs. The program design is entirely up to you. However, as a good engineer, you know that your program should consist of sub-functions. For such a program, answer the following steps item by item (Write each item separately on your answer sheet and separate your answers with lines) a) What parameters does your program need, why? b) How many sub-functions should your program use, why? c) Draw the flow diagram of your program? d) If the steps your main program will consist of, you should code them in C language (do not write the internal codes of the subprograms) e) Code your subprograms