d$)$ Figure $4b$ is an amplifier having a cascade of transistor configurations.

i$)$ Identify the transistor configurations that $Q_1$ and $Q_2$ are apart

$[4$ marks$]$

ii$)$ Qualitatively, describe the impedance at the input and output

$[4$ marks$]$

iii$)$ How many transistors are used in the amplifier?

$[1$ mark$]$

iv$)$ What role does the capacitor play in the circuit?

$[1$ mark$]$

Figure $4$b