Chapter 10.6, Problem 10P

Problems:

For Problems 8-15, make a sketch of the given function on the interval $\left[0,\infty \right)$ and express it in terms of the unit step function.

$f\left(t\right)=\{\begin{array}{l}2,0\le t<2,\\ 1,2\le t<4,\\ -1,t\ge 4.\end{array}$