write a program that uses switch case . The program first asks the user to type an integer value greater than 0. Then the program asks the user to select one operator from + , * , or - If the user types '+', the program should print the sum of all numbers from 1 upto the value typed by the user If user types '*', the program should print the times table of that number if the user types '-', the program should calculate the mean squared difference of this number with all numbers that are greater than zero and less than this number; Formula for mean squared difference (say the number is n) : ( (n-1)*(n-1) + (n-2)*(n-2) + (n-3)*(n-3) +...1)/(n-1)

(JAVA)