The equivalent capacitance between the terminals $X$ and $Y$ in the figure shown will be-

The equivalent capacitance of the circuit shown, between points $A$ and $B$ will be-

In the electric circuit given below, capacitance of each capacitor is $1$ $\mu F$. the effective capacitance between the points $A$ and $B$ is- ( in $\mu F$)

When a potential difference of ${10}^3 \mathrm{V}$ is applied between $\mathrm{A}$ and $\mathrm{B}\text{,}$ a charge of $0.75 \mathrm{mC}$ is stored in the system of capacitors. The value of $C$ is $\left(\mathrm{\mu F}\right)$