$1).$ Consider the following grammar:

S $->$ cABd$/$ Bac

A $->$ Bcd$/$ aab

B$->$ ac$/$ dA$/$ bd

Verify whether the string bdac is derived or not using backtracking approach$($BRUTE$-$FORCE$).$

$2).$ For the following grammar $,$ explain the procedure for Panic $-$mode error recovery in predictive parsing $.$

Here,

e stands for epsilon.

S $->$ AbS$/$c$/$e

A $->$ a$/$ cAd

Verify string aab accepted or not?