Problem $1$

In the network in Figure P$9\mathrm{.}9,$ assuming ideal diodes, calculate the current through $($a$)\backslash (\backslash$mathrm$\{$D$\}\_\{1\}\backslash ),($b$)\backslash (\backslash$mathrm$\{$D$\}\_\{2\}\backslash ),$ and $($c$)$ V$,$ the source.