$.$ a$)$ Write a total of $9$ unit tests, organised into $3$ sets.

b$)$Each test should target one functional element of the program. $($You cannot choose $+,-,/$ and $*)$

c$)$ Write the code that allows the program to pass your tests.

d$)$ Explain your approach in each testset, what was your strategy here?

e$)$GIVE console logs or screenshots of the code BEFORE and AFTER it passed the tests, showing the output of the unit testing library. Shorten output to most important part, where it lists the number of tests passed or failed.

PLEASE MAKE SURE TO INCLUDE EVERYTHING ESPECIALLY NUMBER E$.$ IVE POSTED THE QUESTION TWICE AND NOBODY HAS. PLEASEEE. AND DO NOT COPY OTHER ANSWERS OR ILL CONTACT CHEGG SUPPORT.