Problem $3(8/20$ points$).$

We consider three layer back propagation network which is required to perform logical operation Exclusive$-$OR $($see Figure below$).$ The input vector is $x=\left[\begin{array}{cc}1& 0\end{array}\right].$ In the hidden layer the sigmoid activation function is used. Find

a$)$ The actual output of a neuron $5$

b$)$ The actual error in the output.