A force $\overrightarrow{F}=4\hat{\mathrm{i}}+3\hat{\mathrm{j}}+4\hat{\mathrm{k}}$ is applied on an intersection point of $x=2$ plane and $x$-axis. The magnitude of torque of this force about a point $\left(2,3,4\right)$ is ________.

(Round off to the Nearest Integer)

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

(Round off to the Nearest Integer)

A swimmer can swim with velocity of $12 \mathrm{km}/\mathrm{h}$ in still water. Water flowing in a river has velocity $6 \mathrm{km}/\mathrm{h}$. The direction with respect to the direction of flow of river water he should swim in order to reach the point on the other bank just opposite to his starting point is ________$°$. 

(Round off to the Nearest Integer) (find the angle in degree)

A triangular plate is shown. A force $\overrightarrow{F}=4\hat{\mathrm{i}}-3\hat{\mathrm{j}}$ is applied at point $P.$ The torque at point $P$ with respect to point $O$ and $Q$ are:

The velocity-displacement graph of a particle is shown in the figure.

The acceleration-displacement graph of the same particle is represented by :