$03(30$ points$)$

Consider A CMOS Inverter which drives a circuit with an equivalent output load capacitance of $50$fF and following transistor parameters!

$=202$

$2$n$=70$ LAY$2$

$($wL$)$n$=10$

$$wL$$p$=20$

VINO$=047$

V$7$P$0--05$V

V$0$D$=157$

a$)$ Calculate the rising slew based on $25\%$VDD to $77\%$ VDD crossing points using the average current method only.

b$)$ Calculate the falling slew based on $95\%$ to $5\%$VDD crossing points using the average current method only