Sketch a graph for a function that has the following characteristics.
a. domain: x ≥ 0 range: f (x) ≥ 0 linear and increasing
b. domain: - 10 ≤ x ≤ 10 range: - 3 < f (x) ≤ 3 nonlinear and increasing
c. domain: x ≥ 0 range: - 2 < f (x) ≤ 10 increasing, then decreasing, then increasing, and then decreasing