$\backslash$table$[[$Scenario$,$Probability,Serba Dinamik,Maxis Berhad,AirAsia Berhad$],[$Return$,\backslash$table$[[$Squared$],[$Deviation$]],$Return,$\backslash$table$[[$Squared$],[$Deviation$]],$Return,$\backslash$table$[[$Squared$],[$Deviation$]]],[$Recession$,20\%,5\%,15,8\%,20,-15\%,5],[$Normal$,50\%,12\%,25,15\%,35,0\%,8],[$Boom$,30\%,20\%,40,20\%,40,8\%,15]]$

Based on the information provided above, please calculate the Expected Portfolio Return and Expected Standard Deviation with the weighted below:

a$)$ Equal weighted $(\frac{1}{3}$ for each stock$)$;

b$)$ Serba Dinamik $-50\%,$ Maxis Berhad $-20\%$ & AirAsia Berhad $-30\%$;

c$)$ Serba Dinamik $-30\%,$ Maxis Berhad $-35\%$ & AirAsia Berhad $-35\%$;

d$)$ Serba Dinamik $-40\%,$ Maxis Berhad $-40\%$ & AirAsia Berhad $-20\%.$