(a) Find two explicit functions by solving the equation for y in terms of x. Y1-V9 9-x2 - (positive function) y2= -9-82 (negative function) (b) Sketch the graph of the equation and label the parts given by the corresponding explicit functions. y y -2 4 25 25 2 4 6 -6 -4 -2 -2 -2 -6 -2 -2 (c) Differentiate the explicit functions. dy/dx = -6 2 2 4 (d) Find dy/dx through implicit differentiation. dy/dx= I 6 -25 -4 19- 2 4 2