Write a program to ask the user to enter his$/$her yearly average mark from CPE $313/$ ISE $313/$ MIS $313$ and will show the letter grade equivalent for that average mark. Use the following table for defining the ranges of letter grades

$\backslash$table$[[$Min $\%$ Required,Grade,Min $\%$ Required,Grade$],[95,$A$,70,$C$],[90,$A$-,67,$C$-],[85,$B $+,64,$D$+],[80,$B$,60,$D$],[77,$B$-,50,$D$-],[74,$C$+,$Below $50,$F$]]$