Graph the Function $f(x)=\sqrt{4-x}$ In the Standard Viewing Window $f(x)=0$ Graphically $f(x)>0$ Graphically

Essay

Graph the function $f(x)=\sqrt{4-x}$ in the standard viewing window. Then do each of the following:
(a) Determine the domain analytically.
(b) Use the graph to find the range.
(c) Fill in the blank with either increases or decreases: The function over its entire domain.
(d) Solve the equation $f(x)=0$ graphically.
(e) Solve the inequality $f(x)>0$ graphically.