Some crates are pulled $3\mathrm{.}5$ m up an incline plane at constant velocity. How much work is done by the worker if the coefficient of friction between the bottom crate and the plane is $0\mathrm{.}45.$

A $5\mathrm{.}0$ kg block is pushed $3\mathrm{.}0$ m up a vertical wall with constant speed by a constant force of magnitude $F$ applied at an angle of $30$ with the horizontal. If the coefficient of kinetic friction between the block and wall is $0\mathrm{.}30,$ determine the work done by

$($a$)$ F

$($b$)$ The force of gravity

$($c$)$ The normal force between the block and wall.

Please solve #$4$ & #$5$