For the provided voltage rectifier assume a constant voltage drop model with $V_D=0\mathrm{.}6V$ for all diodes.

Find the required amplitude $V_s$ such that the average voltage $V_0^{+}$is $18$ V $.$

Determine the transformer winding ratio N for $V_{AC}=120**sin(t)$@$60Hz.$

What would the average of $V_0^{-}$be for the selected design.

$V_S=$

$N=$

$V_0^{-}=$