A $32$x unit$-$sized inverter drives a $4$x NOR gate. Compute the sheet resistance of a $0\mathrm{.}08$m thick Cu wire in a $65$ nm process, and the resistivity of Cu is $1\mathrm{.}7$ Find the total resistance if the wire is $0\mathrm{.}125$m wide and $1$ mm long. Suppose that wire capacitance is $0\mathrm{.}15$ fF$/$m and that unit$-$sized nMOS transistor has R $=8$ k$$ and C $=0\mathrm{.}08$ fF$.$ Estimate the propagation delay using the Elmore delay model; neglect diffusion capacitance. Assume W$/$L $=4/2$ in inverters.