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In the circuits shown the threshold voltage of each $\text{nMOS}$ transistor is $0.6\:V.$ Ignoring the effect of channel length modulation and body bias. the values of $\text{Vout}1$ and $\text{Vout} 2,$ respectively, in volts, are

1. $1.8$ and $1.2$
2. $2.4$ and $2.4$
3. $1.8$ and $2.4$
4. $2.4$ and $1.2$