f. atan (0) and atan (1) PRG-4. Show how we can use the round function to round a value. For example, the number 23.2 should be changed to 23, number 23.8 should be changed to 24, the number -23.2 should be changed to -23, and the number 23.8 should be changed to -24. PRG-5. To show the behavior of the random num