This function will accept a numeric value and will convert the numeric grades to letter grades. USE ONLY ifelse$()$ conditional.

If the numeric grade input is

$90$: Grade A

$80$ : Grade B

$70$: Grade C

$60$: Grade D

$40$: Grade E

$<mn\; id="EditorElement\_1426161">4</mn><mn\; id="EditorElement\_1426162">0</mn>$: Grade F

For example,

$>$ grade$\_$calc$(98)$

$[1]$ "Grade A$"$

$>$ grade$\_$calc$(63)$

$[1]$ "Grade D$"$

PLEASE ENTER YOUR R Script IN THE

TEXTBOX BELOW. You can write your comments and explanations for questions # within the sign $\text{'}$#$\text{'}.$

set.seed$(100)$