$($i$1-$h$2=$w$3=25,12-$hl $=$w$2=20,$ h$2-$o$1=45$ and hl$-$o$2=\mathrm{.}50)$

a$)$ The ne twork uses sigmoid activation function. Compute the total error that has to be back

propagated through the network.

$[5]$

b$)$ Find the output at ol and o$2$ if the activation function at the output layer is changed to

Relu? $[1]$

c$)$ Find the output of the network ifa softmax layer is introduced after ol$,$ o$2$ layer? $[1]$