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A triangle has its vertices 'A(3,2) , B(...

A triangle has its vertices 'A(3,2) , B(-5,-4)', 'C(7,8) . P, Q, R' are the midpoints of 'AB', 'BC' and 'AC' respectively.
a) Find the coordinates of 'P, Q' and 'R'.
b) Find the perimeter of `/_\ PQR`.

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