Laboratory Exercise1: 1. Write a program that requests the user to enter two integers. The program should then calculate and report the sum of all the integers between and including the two integers. The program should determine if the first number is smaller than the second number entered otherwise the program will output a message "Invalid input". If invalid input the program should give an option to the user to repeat the process or not. Also, create a function with parameters to compute and return the sum. 2. The Kingdom of Neutronia, where the unit of currency is the KNR, has the following income tax code: a. First 5,000 KNR: 0% tax b. Next 10,000 KNR: 10% tax C. Next 20,000 KNR: 15% tax d. KNR after 35,000 : 20% tax For example, someone earning 38,000 KNR would owe: 5000 x 0.00 + 10,000 x 0.10 + 20,000 x 0.15 + 3,000 x 0.20 = 4,600 KNR Write a program will ask three employees to enter their gross income per month then; the program will compute and output the income tax for each employee. Also, create function that will compute the tax. In addition the program should determine if the input of the user is valid input or not. (Hint: you can assign 1 as Employee1, 2 as Employee2 and 3 as Employee3. Also you will use loop control, and either if-else-if or switch statement)