fullName $-$ the fullName used to set the instance variable

$*$

$*$ The below checks should be performed on the parameter fullName.

$*-$ The fullName should be between $1$ and $20$ characters $($inclusive$)$ in length

$*-$ The fullName should only contain uppercase, lowercase, digits and space characters

$*$

$*$ @return true if all the above conditions are met and false otherwise.

$*/$

public boolean setFullName$($String fullName$)\{$