please answer 1, 2 and 3

1) The number of optically active pentyl alcohols (C5H11OH), i. e2, the total number of individual enantiomers, is: a) 0 b) 2 c) 3 d) 4 e) 6 2) What would be the major product of the following reaction sequence? a) I b) II c) III d) IV e) An equimolar mixture of I and II 3)) Heating 2-ethoxyhexane with one equivalent of concentrated HI would produce: a) CH3CH2OCH2CH2CH2CH2CH2CH2I b) ICH2CH2OCH2CH2CH2CH2CH2CH3 c) CH3CH2I and CH3CH2CH2CH2CH(OH)CH3 d) CH3CH2OH and CH3CH2CH2CH2CHICH3 e) CH3CH2I and CH3CH2CH(OH)CH2CH2CH3