Assume that a and b are int variables and x is a float variable. What is the value of each variable after the following scanf is called? scanf("%d %f %d", &a, &x, &b); supposing the user enters: 4.3 9 12 2. (40 pts) Write a single statement to read the time from the standard input in the form of h:m:s and store it in three integer variables named hours, minutes and seconds. 3. (30 pts) Write a single statement to read a percentage from the standard input. For example, the user enters 12.5% and program stores 12.5 into a float variable named percent. The variable percent has been declared to be float.