Write structures of prudlucts of the following reactions :
I) `CH_3CH=CH_2overset(H_2 O //H^(+))(rarr)`
II)
III) `CH_3-CH_2underset(CH_3)underset(|)(CH)-CHO`

Explanation

I) `CH_3-CH(OH)-CH_3`
 II) `NaBH_4` can reduce aldehydes and ketones to the corresponding alcohols but it has no effect on ester group. Hence the product is

III) `CH_3-CH_2-underset(CH_3)underset(|)(CH)-CH_2OH`