Segment TW is shown with points R and S between points T and W. The length of TR = y + 4, the length of RS = 2y - 8, the length of TS = 140, the length of TW = 284, and the length of RW = 4y + 40. What is the value of y?
ANSWER CHOICES:
A: y=-44
B: y=9.2
C: y=18
D: y=48