DO THIS ON JAVA

PROVIDE CODE SCREENSHOT AND OUTPUT SCREENSHOT.

Working with functions QI A) Write a function (named Compute Circle Area) that takes as input a double (diameter) and returns the area of the circle. Test it. Double Compute Circle Area (Double diameter) { } B) Write a function that takes as input 3 Integers and return the maximum element (test it) Integer maxxl (Integer a. Integer b. Integer c) { } C) Write a function that takes as input a static array of integers, and return the sum Integer maxx2 (Integer Il a { 3