What is the IUPAC name and classify as primary, secondary or tertiary

Question

..............__
1. CH3CH2-O-/..\
.............\__/

2. CH3
.......\
.......CH-CH2-CH2-OH
......./
....CH3

3. CH3CH2CH2CH2CH2OH, i show this to be 1-Pentanol which is primary.

Answer 1

2 is 2-methyl butanol.