Todd, Jeremy and Adam are brothers. Todd's age is three times as much as Adam's age and Jeremy is five years elder than Adam. If Todd is 15 years old, how old are Jeremy and Adam?

The input to the function is x and the output is y. write the function such that x can be a vector (use element-by-element operations). a) use the function to calculate y(-1.5) and y(5). b) use the function to make a plot of the function y(x) for -2 ≤ x ≤ 6.