SMART PPL HELP! name organic compounds HELP DUE TM?

Question

a) CH3CHCH off the 2nd C is H3C off the 3rd C is =O

b) CHCCH2CH2COOH off the 2nd C is both CH3 & CH2CH3

c) CH3CH2CH2CCCH2CH3 off the 4th C is both H & H3C off the 5th C is =O

d)CH3CH2CHCH2CH off the 3rd C is CH2CH3 and off the 5th C is =O

HELP PLEAE

Answer 1

a. 2-methylpropanal

b. 4,4dimethylhexanoicacid

c. 4-methylhept-3-one

d. 3-ethylpentanal