I WILL GIVE DISLIKES $!!!$ IF ANYTHING WRONG HAPPENS IN MY QUESTION, BETTER SKIP IT$!!!$

$"3.$

$($i$)$ u $=$ v $/$ w $*$ x $+$ y $/$ z $*$ t

$($ii$)$ q $=$ r $+$ s XA$16*$ t $+$ u $+$ v $*$

$4.()$Backus Naur $$

$($i$)$

$($ii$)$

$()$

$($i$)$

$($ii$)$

$5.()$ TOP$-$DoWN $-$

$$

$().--$

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