5. A tangent, T1, is drawn to the curve f(x)=-1/4x²-3x+1 at point P(-2, 6).
a. Calculate the equation of T1
Another tangent to the curve, T2, with equation y=10, is drawn at point Q.
b. Calculate the coordinates of point Q.
c. T1 and T2 are extended so that they intersect. Calculate the coordinates of their point of intersection.