$3)$ A$10$x unit$-$sized inverter drives a $2$x unit$-$sized inverter at the end of the $5$mm wire $(4)$ wide metal$2$ wire in a $0\mathrm{.}6$ m process; the wire width is $1\mathrm{.}2$um; thickness is $0\mathrm{.}144$um$).$ The wire has sheet resistance of $0\mathrm{.}081$ per square and the capacitance is $0\mathrm{.}2$fF$/$um$.$ Construct a model for the wire. The gate capacitance is C $=2$fF$/$um and the effective resistance is R$=2\mathrm{.}5$klum for NMOS transistors. Estimate the propagation delay using the Elmore delay model; neglect diffusion capacitance. Use $=90$nm for transistor dimensions. O $0\mathrm{.}68$ ns O $0\mathrm{.}1$ ns O $0\mathrm{.}86$ ns O $1\mathrm{.}21$ ns O $0\mathrm{.}68$ ps O $0\mathrm{.}1$ ps O $0\mathrm{.}86$ ps O $1\mathrm{.}21$ ps