An object moves along a straight line path from $P$ to $Q$ under the action of a force ($4\widehat{\mathrm{i}}-3\widehat{\mathrm{j}}+3\widehat{\mathrm{k}}$)$\mathrm{N}$ . If the coordinates of $P$ and $Q$ in metres are ($3,3,-1$) and ($2,-\mathrm{1,4}$), respectively, then the work done by the force is

Figure gives the acceleration of a $2.0 \mathrm{kg}$ body as it moves from rest along $x-$axis while a variable force acts on it from $x=0 \mathrm{m}$ to $x=9 \mathrm{m}$. The work done by the force on the body when it reaches
(i) $x=4 \mathrm{m}$ and
(ii) $x=7 \mathrm{m}$ shall be as given below.