Hey guys, I can't figure these out,

(refer to the posted graph)

a. Evaluate f^-1 (1).

b. If If g(x) = x^2 + 1, evaluate (f^-1 o g)(1) and (g o f )(1).

c. Graph y = 1 – f(x + 3).

d. State the domain and range of y = 1 – f (x + 3).

I can do part d, if someone could explain why there's an "f" in front of (x + 3) or if someone shows me the graph.