If x and y are integers such that (x+1)^2 is less than or equal to 81 and (y-1)^2 is less than 64, what is the sum of the maximum possible value of xy and the minimum possible value of xy?	Select
A) -16 B) -20 C) 0 D) 14 E) 16
(x+1)^2 &lt;= 81   x &lt;= 8   x &gt;= -10   (y-1)^2 &lt; 64   y &lt; 9   y &gt; -7   Max possible value of xy is -10 × -6 = 60   minimum possible value of xy is -10 × 8 = -80   -80 + 60 = -20   Answer : -20
<result>B</result>
If x and y are integers such that (x+1)^2 is less than or equal to 81 and (y-1)^2 is less than 64, what is the sum of the maximum possible value of xy and the minimum possible value of xy?