This is worth up to six $(6)$ points extra credit. Consider the following fragment of main and function called letterGrade$().$ Assume all other code is correctly defined so that these work. Convert the given code to handle an exception, in which the function throws an exception if the passed$-$in grade is below $60\mathrm{.}0($assumed on a $100-$point scale$).$ The section in main should contain the try and catch blocks, and the function should add a correctly written throw statement. Have the catch print a message that says the specific is too low to report a letter grade $($include the actual value that caused the throw$).$

string letterGrade$($float grade$)\{$

if $($grade $>92)$ return $"$A$"$;

else if $($grade $>88)$ return $"$A$-"$;

else if $($grade $>85)$ return $"$B$+"$;

$...//$ other options omitted for brevity

$\}$

int main$()\{$

float grade;

cout $<<$ "What is the score, $0$ to $100?"$;

cin $>>$ grade;

string lgrade $=$ letterGrade$($grade$)$;

cout $<<$ "The grade was a $"<<$ lgrade $<<$ endl;

$\}$