All about alkenes

Write structures of all the alkenes which on hydrogenation give 2-methyl butane.

Write structures of all the alkenes which on hydrogenation give 2-methylbutane.

Write the structure of all the alkenes that can be hydrogenated to from 2-mrthyl pentane.

All about Neet 24

When neopentyl alcohol is treted with H_(2)SO_(4) , a mixture of two alkenes (85:15) is formed. Which statement (s) is /are correct about these alkenes ?