Exercise $6\mathrm{.}5\mathrm{.}1$ Derive the back propagation update rule for $w{w}_{21}$ and $w_{13}$ in the $3/3-2-1-$neural net$-$

work with activating functions above, by following the same steps as above.Exercise $6\mathrm{.}4\mathrm{.}2$ Derive the back propagation update rules for $ww{w}_2,w{w}_{21},$ and $w_{12},$ in the $2/3-2-1-$

neural network above, by following the same steps as above.