Figure P2-70 shows a programmable voltage divider in which digital inputs (b_{0}) and (b_{1}) control complementary analog

Question:

Figure P2-70 shows a programmable voltage divider in which digital inputs $b_{0}$ and $b_{1}$ control complementary analog switches connecting a multitap voltage divider to the analog output $v_{\mathrm{O}}$. The switch positions in the figure apply when digital inputs are low. When inputs go high the switch positions reverse. Find the analog output voltage for $\left(b_{1}, b_{0}ight)=(0,0),(0,1),(1,0)$, and $(1,1)$ when $V_{\mathrm{REF}}=12 \mathrm{~V}$.

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