A spherical balloon is being inflated at the rate of $35 \mathrm{cc}/\min$. The rate of increase of the surface area of the balloon when its diameter is $14 \mathrm{cm}$ is

The weight $W$ of a certain stock of fish is given by $W=nw$, where $n$ is the size of stock and $w$ is the average weight of a fish. If $n$ and $w$ change with time $t$ as $n=2t^2+3$ and $w=t^2-t+2$, then the rate of change of $W$ with respect to $t$ at $t=1$ is