please help!

disregard 17 sorry!

of the last question, which of the strings it generates are ambigu- illion I continued _17. In the grammar of the last 9 ous? (a) None of them. (c) All those longer than four. (e) All those having an odd length. ) All those whose length is not a prime numbe - 18. The terminal symbols in a CFG to (6) All of them. (d) All those of length divisible by four. terminal symbols in a CFG for a practical programming language are called (a) atoms (6) termites (c) tokens (d) signifiers 19. Abstract syntax (a) Records only operations and their order, but does not specify the operands the are applied to. (6) Gives a general description of a program which does not precisely record either syntax or semantics. (c) Discards syntactic structure (punctuation and all that), but retains sufficient formation to execute each operation in order. (d) Retains the symbols and punctuation, but discards all information about order or relationship to each other