$3\mathrm{.}13$ LAB: Branches: Find Letter Grade $($LT$-$C$-$SP$24)$

Read an input from the Input Box that is a Student's Average.

Using a $10$ point scale:

$90$ to $100$ is an A

$80$ to $89$ is a B

$70$ to $79$ is a C

$60$ to $69$ is a D

below $60$ is an $F$

Display the message

Student Average: average

Student Grade: grade

where grade is $A,B,C,D,$ or $F.$

For example if the input is:

$95$

The output should be:

Student Average: $95$

Student Grade: A

If the input is:

$72$

The output should be:

Student Average: $72$

Student Grade: C