Answer
See below
Work Step by Step
We can write the given function as:
$f(t)=t(1-u_3(t))+(6-t)(u_3(t)-u_6(t))$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.