i need help understanding this please

2) Identify the functional groups (FG's) and assign the class of compounds for each molecule, 8 points Choose FG's from: Vinyl, allyl, alkynyl, phenyl, benzyl, halido, hydroxyl, alkoxy (ether), amino, mercapto, alkylthio, carbonyl, carboxy, amido, cyano Choose classes from: alkene, alkyne, aromatic compound, alkyl halide, alcohol, ether, amine, thiol, thioether, aldehyde, ketone, carboxylic acid, ester, acyl chloride, amide, nitrile Incorrect assignments beyond the number of actual assignments that can be made give a deduction