The midpoint of JK is point L at (-1, 8). One endpoint is J(4, -15). Which equations can be solved to determine the coordinates of the other endpoint, K?
a. 4 + X / 2= -1
b. -1 + X / 2= 4
c. -15 + Y = 16
d. -1+4 / 2 =x1
e. 8 - 15 / 2 = y1