QUESTION $3(10$ marks$)$ a$)$ Convert the following expressions to prefix and postfix expression: i$.$ PEQIR $+($S$*$ T$/$U$)$ ii$.($A$/$B$)+($C$+$D $*$E$*$F$)$ b$)(6$ marks$)$ Show the sequence of stack configuration in the evaluation of the following postfix expression: ABCDEFG $++$ Given, A $=22,$ B $=2,$ C $=40,$ D $=5,$ E $=3,$ F $=6,$ G $=4(4$ marks$)$