ANSWER
a) y=-4
b) 2
c) y=2sinx-4
Step-by-step explanation
The midline divides the graph into two equal halves.
The midline of the red graph is

The amplitude is the distance from the midline to the peak of the graph.

The amplitude is 2.
The red graph is a transformation of the blue graph.
This transformation is of the form:

Where a=2 is the amplitude and d=4 is the downward shift by 4 units.
