4.1 Calculate the gradient of NQ. (1)
4.2 Calculate the gradient of MP. (1)
4.3 Calculate the angle of inclination of MP. (3)
4.4 Hence, determine the equation of the line MP. (4)
4.5 Hence, determine the coordinates of P. (4)
4.6 Determine the co-ordinates of R. (3)
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