(b) A junior design engineer increased the length (L) of MOSFET to achieve a unity volage gain for the circuit shown in Figure Q1 b. (i) Please explain (ignore body effect), what could be the possible reason [10 Marks] that increasing the transistor length would result in a lower than expect voltage gain (ii) Which other transistor parameter can be changed to achieve the [5 Marks] desired voltage gain of unity?