05. Find the amplitude, period, phase shift and five key points, then graph the function y = -2Cos(3x – TT) (2 marks) Q6. To determine the height of a building, two measurements are taken at a distance of 100 feet apart. If the first angle of elevation is 50 and the second is 28°, what is the height of the building? Draw picture, solve to the nearest feet. (1 mark) Q7. Find the amplitude, period and phase shift for the curve, then write the function in the form y = A Sin(Bx + C). (1 mark)