Name and mathematically describe the $5$ programming steps you would take to train this model with PyTorch using SGD on a single batch of data. $($b$)$ For a single data point $($x$,$ y$),$ write down all inputs and outputs for forward pass of each layer. You can only use: $\{,,1,1,2,2\}$ in your answer. $($Note that $()=+)$