$($b$)$ BCC Express Mart requests a program that will display products' price based on the product ID entered by the user. Get the user re$-$enter the product ID again if it is invalid. $($Hint: Use any looping control structure and switch statement$)$

The product IDs and prices are shown below.

$\backslash$table$[[$Product ID$,$Price $($RM$)],[101,5\mathrm{.}99],[102,12\mathrm{.}30],[103,2\mathrm{.}50],[104,6\mathrm{.}10],[105,7\mathrm{.}40]]$

$(9$ marks$)$