Answer#1
1. Conditional Formatting
Explanation:
we can follow these steps for conditional formatting
first of all Select those cells which needs formatting
after that click on Home tab then click on Conditional Formatting tab then click on New Rule button
after that a formatting rule dialog will be open just click on Use a formula to determine which cells to format.
Under Format values where this formula is true, type the formula that is to beedited
then finally Click on Format button
Answer#2
2. Nested IF
Explanation:
nested if is basically defined as a thing that is nested and is fully contained within something else of the same kind.