Question

Consider the reaction described by the following equation.
C2H4Br2(aq)+3I-(aq)------>C2H4(g)+2Br-(...
The rate law is:
rate=k[C2H4Br2][I-] Where k=4.21x10^-3 M-1 x S-1

What are the missing entries in the following table?

Initial rate of information
Run [C2H4Br2]0(m) [I-]0(M) of C2H4(Ms-1)
1 x 0.249 0.000104
2 0.249 y 0.000522
3 0.249 0.249 z

I have managed to solve for z which is 0.00026... However,
I'm having problems finding x and y for the chart. Assistance completing would greatly be of help. Thank you.