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5. (20) Parsing. Consider the CFG for in the slides for parsing (around P16). Trace the table driven parser on the following input program, as done in the class discussion: sum := A + B write sum. LL(1): example grammar 1. - $$ 2. | E 3. id := | read id | write 4. 5. 1 6. 7. + | E 8. + ( ) | id | number 9. + + | - 10. 7 * / Top-of-stack nonterminal id number read Current input token write := ( ) + - * . $$ i TIL TO program stmt_list stmt expr term_tail term factor_tail factor add_op mult_op II III ON Tito i 5 ini loiali 12 12 16 - 17 - - 18 - 19 1. program stmt_list $$ {id, read, write, $$} 2. stmt_list + stmt stmt_list {id, read, write} 3. stmt_list + {$$} 4. stmt id := expr {id} 5. stmt + read id {read} 6. stmt + write expr {write} 7. expr + term term_tail {(, id, number} 8. term_tail add_op term term_tail {+, -} 9. term_tail e{), id, read, write, $$} 10. term + factor factor_tail {(, id, number} 11. factor_tail + mult_op factor factor_tail {*, /} 12. factor_tail +{+, -, ), id, read, write, $$} 13. factor + ( expr ) {(} 14. factor +id {id} 15. factor + number {number} 16. add op ++ {+} 17. add_op +-{-} 18. mult_op=+*{*} 19. mult_op +/{/} 5. (20) Parsing. Consider the CFG for in the slides for parsing (around P16). Trace the table driven parser on the following input program, as done in the class discussion: sum := A + B write sum. LL(1): example grammar 1. - $$ 2. | E 3. id := | read id | write 4. 5. 1 6. 7. + | E 8. + ( ) | id | number 9. + + | - 10. 7 * / Top-of-stack nonterminal id number read Current input token write := ( ) + - * . $$ i TIL TO program stmt_list stmt expr term_tail term factor_tail factor add_op mult_op II III ON Tito i 5 ini loiali 12 12 16 - 17 - - 18 - 19 1. program stmt_list $$ {id, read, write, $$} 2. stmt_list + stmt stmt_list {id, read, write} 3. stmt_list + {$$} 4. stmt id := expr {id} 5. stmt + read id {read} 6. stmt + write expr {write} 7. expr + term term_tail {(, id, number} 8. term_tail add_op term term_tail {+, -} 9. term_tail e{), id, read, write, $$} 10. term + factor factor_tail {(, id, number} 11. factor_tail + mult_op factor factor_tail {*, /} 12. factor_tail +{+, -, ), id, read, write, $$} 13. factor + ( expr ) {(} 14. factor +id {id} 15. factor + number {number} 16. add op ++ {+} 17. add_op +-{-} 18. mult_op=+*{*} 19. mult_op +/{/}