Question on Linear Neurons:

The following is a network of linear neurons, that is$,$ neurons whose output is identical to their net input,

oi $=$ neti. The numbers in the circles indicate the output of a neuron, and the numbers at connections indicate the value of the corresponding weight.

Compute the output of the hidden$-$layer and the output$-$layer neurons for the given input $(0\mathrm{.}5,1)$ and enter those values into the corresponding circles.

What is the output of the network for the input $(1,2),$ i$.$e$.$ the left input neuron having the value $1$ and the right one having the value $2?$ Do you have to do all the network computations once again in order to answer this question? Explain why you do or do not have to do this.