A body of mass 2 kg moves under a force of (2 i +3 j +5 k ) N. It starts from rest and was at the origin initially. After 4 s, its new coordinates…

A body of mass $\displaystyle 2$ kg moves under a force of $\displaystyle (2 \hat{i}+3 \hat{j}+5 \hat{k}) \mathrm{N}$. It starts from rest and was at the origin initially. After $\displaystyle 4$ s , its new coordinates are ($\displaystyle 8$, b, $\displaystyle 20$). The value of b is \_\_\_\_. (Round off to the Nearest Integer)