Problem a (LA2a.java) Write a program to compute the area, perimeter, and interior angle of a regular polygon. First, have the user supply the number of sides of the polygon (a whole number, which must be 3 or greater) and the side length (any positive number). Then, compute the area via the following equation: san Area = 4tan where n is the number of sides and s is the side length. (please use Math.PI to do the calculation, tan you can use Math.tan( to calculate.). Then, compute the perimeter via the following equation: Perimeter = ns and then the interior angle in degrees) via the following equation: 360 Interior Angle = 180 n So, an example run of your program would look like the following: Enter number of sides: 3 Enter side length: 1 Area: 0.433 Perimeter: 3.000 Interior Angle: 60.000 degrees