A parcel delivery service will deliver a package only if the length plus girth$($distance around$)$ does not exceed $108$ inches.

$($A$)$ Find the dimensions of a rectangular box with square ends that satisfies the delivery$$ service's restriction and has maximum volume. What is the maximum$$ volume?

$($B$)$ Find the dimensions$($radius and$$ height$)$ of a cylindrical container that meets the delivery$$ service's restriction and has maximum volume. What is the maximum$$ volume?