Problem 2. (40 points) Write a MATLAB program that reads the time in seconds since the start of the day (this value will be somewhere between 0 and 86400.) and prints the time in the form HH:.MM.SS using the 24-hour clock convention. User the proper format to ensure that the leading zeros are preserved. Also, be sure to check the input number of seconds for validity, and write an appropriate message if an invalid number is entered. You are free to user any functions, e.g.. 1) use the fprintf function (check for the "example04.m" file on blackboard); or 2) use the disp and sprintf functions