If 4≤x≤84 \leq x \leq 84≤x≤8 and 2≤y≤72 \leq y \leq 72≤y≤7 , then what is the ratio of maximum value of (x+y)(x + y)(x+y) to minimum value of (x−y)(x - y)(x−y) ?A6B152\frac{15}{2}215C−152-\frac{15}{2}−215DNone of the above