Q$4.$ Digital data is transmitted through a baseband system with $N_o={10}^{-7}\frac{W}{H}z.$

The received signal amplitude $A=20mV.($a$)$ If ${10}^3$ bits per second $($ bps $)$ are transmitted, what is $P_E?($You may use the approximation if $z>3dB).($b$)$ If we increase the data rate to $5{10}^{4}bps($each bit $T$ reduces in this case$),$ please adjust A to main the same $P_E$ as in part $($a$).[$i$.$e$.,$ Tune transmitter condition $(E_b)$ to meet