Please answer the questions below

Question 3 Does the graph below represent a function? 6 5 -6-5 -4 2 1 2 3 4 5 6 a) Yes ( b) NoQuestion 4 Suppose that f(x) = x2,x E R, and g(x) = 3+x ,x ER, then (f.f) (x) is O a) ( 3 + x ) 2 ( b) 6+x Oc) 3+ x2 Od) x 4 O e) None of the aboveQuestion 5 The inverse of the function f(x) = Vx+8 if x 2 0 is O a) x + 8 Ob) x' - 8 O c) Vx - 8, x 20 O d) Vx + 8, x 20 Oe) None of the above