1. Add the following four operations in the proper location for the order of operations to apply to the EBNF grammar below.
   • subtraction,
   • division,
   • integer modulus division,
   • exponents

1. Use the grammar above to draw the following
   • (2 * 7 + (4 * 5)) parse tree
   • 3 * (4 * 5) + (6 + 7) abstract syntax tree
   • 3 + (4 + 2) * 6 + (7 * 8) parse tree

exprterm + term term-factor *factor actor-e number digit { digit digit 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 expr number