The provided program will ask the user for his grade as an integer and report the letter grade according to the following conditions:

$90$ or greater: A

$80$ to $90($not inclusive$)$: B

$70$ to $80($not inclusive$)$: C

$60$ to $70($not inclusive$)$: D

less than $60$: $F$

The program has $4$ bugs. Find and fix them.

Instructions:

There is no need to perform input validation on this program.

Repeated bugs of the same type are considered a single bug and not two or more different bugs.

Answer: $($penalty regime: $10,20,..\%)$

marks $=$ int$($input$("$Enter the student's marks

if marks $>90$:

grade $="A"$

if marks $>80$:

grade $="$B$"$

if marks $>70$:

grade $="$C$"$

if marks $>60$:

grade $="$D$"$

print$("$The student received a grade of $\{$grade$\}$