# $5.$ Inside the while loop, check if the input score is within the valid range $(0-100).$ If it's not, display an error message and ask the user to re$-$enter the score.

# $5$a$.$ Check if the input score is within the valid range $(0-100).$

# $-$ Utilize conditional statements $($if$,$ elif, else$)$ to verify the score's validity. Consider how to handle invalid scores.

# $-$ Provide a clear error message to guide the user on what's expected in terms of valid scores.

Ar $=($x$,$y$)$ in R$\backslash$times R: x$2+$y$2=$r$2$

Br $=($x$,$y$)$ in R$\backslash$times R: x$2+$y$2<=$r$2$

Cr $=($x$,$y$)$ in R$\backslash$times R: x$2+$y$2>$r$2.$

$($a$)$ Determine r in I Ar and r in I Ar$.$

$($b$)$ Determine r in I Br and r in I Br$.$

$($c$)$ Determine r in ICr and r in ICr