Fuch numbered item consists of a stamdard part worth 16 points and a challenge worth 8 points (Hence, the standard parts are worth a totai of 80 points and the challenges are worth a total of 40 points) Partial credit is available on most items. Show all work' Answers without adequate support will not receive fiull credit 1. STANDARD PART: Consider the following context free grammar with the "Weird" operations ? and #: aiblcld Use the expression "a # b ? c" to show that this grammar is ambiguous. CHALLENGE: Now, write an unambiguous grammar for expressions in which (1) parenthesized expressions take precedence over any other expression, (2) # take precedence over ?, (3) both operations are left. associative. (So, for example, "a ? b # c ? d" means "(a ? (b # c)) ? d".)