Write an if/then/else primitive to do each of the following operations:
A. Compute and display the value x / y if the value of y is not 0. If y does have the value 0, then display the message 'Unable to perform the division'.
B. Compute the area and circumference of a circle given the radius r if the radius is greater than or equal to 1.0; otherwise, you should compute only the circumference.
