Write a pseudocoded program to input a sequence of numbers (representing kilowatt-hours, KWH) and output electric bills according to the following schedule: Each of the first 100 KWHs costs 10 cents Each of the next 100 costs 6 cents Each of the next 200 costs 8 cents Each KWH over 400 costs 10 cents. The program should terminate when a negative number is inputted. Also, how could you improve this program to handle the situation in which the rate schedule changed rapidly?