For the given single phase rectifier circuit; Assume thyristors are triggered with $40$ degree and load is R type; Use Vs$=380$ Volt$-$rms & $400$Hz$,$ R$=10$ ohm.

a$)$ Draw the graphics of source voltage $($Vs$),$ source current $($Is$),$ load voltage $($Vo$),$ load current $($lo$),$ Thyristor T$1$ voltage $($V$-$t$1)$ in same time axis $?(10$ pt$)$

b$)$ Determine the average value of load voltage in terms of $($COSa$)$ triggering angle $?(15$ pt$)$

c$)$ Calculate the average value of Vo$,$ lo$,$ active power of load $($Po$)?(10$ pt$)$