Answer:
Options a and b
Step-by-step explanation:
Amplitude of the graph = 3 but shown correctly
Hence option a is right
There is a vertical shift of 1/2 down. Shown correctly
Option b is right
Horizontal shift is 1 unit to the left after adjusting x for x/4. Shown incorrectly
OPtion c is not right
Period is 8 pi not shown correctly
OPtion d is wrong.
Horizontal expansion is not shown at all for x/4
Hence option e is wrong.