I don't know the answer to all the questions

Example 4 M(3, - 1) is the midpoint of PQ. Given P(5, 7), find the coordinates of Q. Solution Let Q be the point (x, y'). Then use the midpoint formula. Find x: x1 + x2 = 3 Find y: y1 + 12 = -1 2 2 5 + x= 3 7+ y 2 2 5 + x= 6 7+ y= -2 x = 1 y = -9 .. Q is the point (1, - 9). Find the coordinates of Q given that M is the midpoint of PQ. 20. P(0, 0), M(2, -4) 21. P(6, 5), M(3, 4) 22. P(0, 9), M(-2, -3)