$($A$)$ Calculate the $V_{\text{O}\text{u}\text{t}}$ for the binary inputs $(ABCD)=(0000),(0110),0$ and $([1,1,1,1])$ for the following $4-$bit DAC. Also calculate the least significant bit $($LSB$)$ and full scale output $($FSO$)$ for this setup.

$($B$)$ Determine the weight of each input bit.

$($C$)$ Estimate the maximum error in the output for $1\%$ uncertainty in the resisters.