An $emf$ can be induced in stationary coil if it is kept in

The magnetic flux through a coil varies with time $t$ as shown in the diagram. Which graph best represents the variation of the $e.m.f. E$ induced in the coil with time $t ?$

A short bar magnet passes at a steady speed right through a long solenoid. A galvanometer is connected across the solenoid. Which graph best represents the variation of the galvanometer deflection $\theta$ with time $t ?$

A bar magnet is made to fall through a long vertical copper tube. The speed $\left(v\right)$ of the magnet as a function of time $\left(t\right)$ is best represented by