Consider the following grammar.
s→ a
a→ a+a | b++
b →y
you are required to draw parse tree for the input"y+++y++"

The given grammar is: {S→ A, A→ A+A | B++, B →y.}

Now to draw the parse tree for the input "y++ + y++", follow these steps:

                                  S→ A→ A + A

                                 S→ A→ A + A → B++ + B++

                                S→ A→ A + A → B++ + B++ → y++ + y++.

loool i m also trying to figure that out.seems like u should have genius ranking

answerthe reference of the object;