Question

Please help! I'm taking a timed quiz and I'm having trouble with the last three questions (pictures will be posted):
1) What is the IUPAC name of the following compound? 3-methyl-3-propylbutanal, 3-methyl-3-propyl-1-butanal, 3,3-dimethyl-1-hexanal, or 3,3-dimethy-2-lhexanal
2) What is the IUPAC name for? 2-aldehydomethyl-4-methylpentane, 3,5-dimethyl-1-hexanal, 2,4-dimethyl-6-hexanal, or 3,5-dimethylhexanal.
3) What is the IUPAC name for the following compound? cyclopentanone-2,3-diol, 1,2-dihydroxy-3-cyclopentanone, 2,3-dihydroxycyclopentanone, or cyclopentanone-1,2-diol.