Do the following for each problem:
(1) Sketch the graph.
(2) If the function is invertible, find the inverse and sketch it on the graph too.
(3) If the function is not invertible, explain why.
(4) If the function is its own inverse, show that f(f(x)) = x.
Problem 1.
Problem 2.
Problem 3.
Problem 4.
Problem 5.