Use what you know about transforming parent graphs to write an equation for each of the graphs described below.
a. A parabola stretched by a factor of 0.25, opening downward and shifted 12 units down and 3 units left.
b. A cubic with a stretch factor of 2 and a locator point at (-6, 1).
c. A hyperbola y = with asymptotes at y = -6 and x = 2.