$1)$ for all followin expressions convert the infix expression to postfix expression

using stack and using manual process

a$)$ G $*($ B $+$ C $)($ D $+$ E $)$

b$)$ A $*$ B $($C $+$ D$)+$ E

c$)$ T $*(($R $+$ s$)$ u $/$v $+$ w$)$

SHOW ME ALL STEPS