QUESTION 4 The points P(-3: 2), Q(9; 10) and R(a, 4) lie on the crcumference of circle, as shown in the figure below. PR is a diameter of the circle with centre C. 41 Q(9:10) R(a;4) P(-3;2 4.1.1 Show that a =13. Determine the equation of the circle in the form: (x-a)'+(y-b)'-r 4.1.2

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