(a) Compound A `(C_(8)H_(8)O)`on treatment with `NH_(2)`OH. HCI gives B and C. B and C rearrange to give D and E, respectively on treatement with acid. B, C, D and E are all isomers of moleculare formula `(C_(8)H_(9)N)` When D is boiled with alcohol KOH an oil F `(C_(6)H_(7)N)` separates out F, reacts rapidly with `CH_(3)` COOI to give back D. On the other hand. E on boiling with alkali followed by acidification gives a white solid G`(C_(7)H_(6)O_(2))`. Identify `A-G`
(b) Carry out the following transformation in not more than three steps. `1`-butyne "to" `2`-pentanone