In Francistown, $65\%$ of the registered car drivers are at least $25$ years old. Of these drivers $4\%$ are annually convicted of motoring offence. This figure rises to $15\%$ for younger drivers. You are the CEO of an insurance company; an employee of your company has been recently been charged for over speeding:

$($a$).$ Calculate the probability that;

$($i$).$ The employee is at least $25$ years old.

$($ii$).$ The employee is younger than $25$ years old.

$($b$).$ Comment on your results from part a$).$