IUPAC names for the following compounds please

Question

1..............O
...............||
..........--...C
........./..\ /..\
.........\../.....H
..........--

2. ..............O
..................||
............CH3CH2-C-CH3

3..........CH3.O
...........|...||
.....CH3CH2CCH2C
................\
................OH

4............O
.............||
....CH3CH2CH2C
............. \
..............OCH2CH3

5..............O
.....--........||
..../..\-CH=CH-C-H
....\../
.....--