2. for a CMOS inverter we have the following parameters:
$(W/L)_p = 5.25$, $(W/L)_n = 1.5$, $k'_n = 115 \times 10^{-6} A/V^2$, $k'_p = -30 \times 10^{-6} A/V^2$, $V_{Tn} = 0.5V$, $V_{DSATn} = 0.63V$,
$V_{DSATp} = -1V$, $V_M = 1.25V$ The supply voltage is given as $V_{DD} = 2.5V$. Assuming both transistors are
in velocity saturation and ignoring channel length modulation, find $V_{Tp}$.