Question: Write a complete lava program that reads 20 values of type double from the keyboard into an array. Display the last (20th) number read. Then display the numbers in the array and how much each number differs from the 20th number read. For example, if the last value typed by the user is 5.0, the difference between the array element 2.0 and 5.0 is -3.0. If an array element is 7.0, the difference is 2.0. Assume that the use enters 20 numbers, one per line, at the keyboard. You need not give elaborate instructions to the user.