send to expert Given a $4$ length sequence RNN$,$ compute $\frac{del{L}_2}{\text{d}\text{e}\text{l}\text{b}}$ and show how you derived it$.$ In

addition, please provide its computation graph.

The following equations might be helpful:

$a_t=U{x}_t+W{h}_{t-1}+b$

$h_t=tanh(a_t)$

$o_t=Vh{h}_t+c$

hat$(y{)}_t=$Softmax$(o_t)$

$L_t=CE(hat(y{)}_t,y_t)$

$f(x)=tanh(x)longrightarrow{f}^{\text{'}}(x)=1-tan{h}^2(x)$

Hint: You can combine softmax and CE into a single derivative as follows:

$\frac{del{L}_t}{del{o}_t}=$hat$(y{)}_t-y_t$