Part 1:

Create a C# Form with a textbox and a button.  The box is for a user to enter a number of seconds.  And when the user clicks the button, the program displays the equivalent number of hours, minutes and seconds using a MessageBox.Show method.  If the seconds entered is less than 60, your program should only display the seconds; if the seconds is a least 60 and less than 3600, your program should display minutes and seconds; if the second is at least 3600, your program should display hours, minutes and seconds.  Use the following data to test your program:

            47 seconds:  47 seconds

645 seconds: 10 minutes, 45 seconds

            7565 seconds: 2 hours, 6 minutes, 5 seconds

Requirements:

1. Input validation: The number of seconds cannot exceed 86400.  You must use textbox’s Validating event to do the validation.

2. Turn in the form’s screenshot and the code.  (Note: You can use the Alt + PrintScrn keys to capture only the active window.)

Part 2:  An electric company charges customers based on Kilowatt-Hours (Kwh) used.  The rules to compute the charge are:

            First 100 Kwh,                                                            25 cents per Kwh

            Each of the next 100 Kwh (up to 200 Kwh),             35 cents per Kwh 

(the first 100 Kwh used is still charged at 25 cents each)

            Each of the next 200 Kwh (up to 400 Kwh)              50 cents per Kwh

            All KHwh over 400,                                                   60 cents per KH

Create a C# Form with a textbox to enter Kwh used, a read-only textbox to display the electricity charges, and a button to compute the charges.  The Kwh used could be a number with decimals.