ANSWER
Vertical shift is 1 unit down.
Maximum value is 3
Minimum value is -5.
EXPLANATION
The given function is
[tex]y = 1 + 4( \cos(x) - \frac{1}{2})[/tex]
This is the same as,
[tex]y = 1 + 4\cos(x) - 2[/tex]
[tex]y = 4\cos(x) - 1[/tex]
The vertical shift is 1 units down.
The maximum value is 4-1=3
The minimum value is -4-1=-5
