A partly$-$full paint can has $0\mathrm{.}403$ U$.$S$.$ gallons of paint left in it$.($a$)$ What is the volume of the paint, in cubic meters? $($b$)$ If all the remaining paint is used to coat a wall evenly $($wall area $=15\mathrm{.}8m^2),$ how thick is the layer of wet paint? Give your answer in meters.

$($a$)$ Number

Units

$($b$)$ Number

Units