Given $f ( x ) = \sqrt { x }$ (A) Find an Equation of the Tangent Line to the (A)

Essay

Given $f ( x ) = \sqrt { x }$ (a) Find an equation of the tangent line to the graph of $y = f ( x )$ at
(i) x = 0.(ii) x = 4.(iii) x = 9.(b) Sketch a graph of $y = f ( x )$ and the tangent lines you found in parts (i), (ii) and (iii) on one set of coordinate axes.