Which statement proves that the diagonals of square PQRS are perpendicular bisectors of each other? The length of overline SP overline PQ overline RQ i, and overline SR are each 5. The slope of overline SP and overline RQ is - 4/3 and the slope of overline SR and overline PQ is 3/4 The length of overline SQ and overline RP are both square root of 50 The midpoint of both diagonals is 4 1/2 ,5 1/2 , the is 7, and the slope of overline SQ is - 1/7 slope of overline RP 2 4 6