Consider the reaction described by the following equation.

Consider the reaction described by the following equation.
C2H4Br2(aq)+3I^-(aq) ----->; C2H4(g)+2Br^-(aq)+i(negative charge)(three subscript) (aq)
The rate law is rate = k[C2H4Br2] [I^-]
Where k=4.77x10^-3 M^-1 s^-1
What are the missing entries in the following table?

Run, [C2H4Br2]0(M), [I^-]0(M), Initial rate of formation of C2H4(M s^-1)
1, x, 0.299, 0.00100
2, 0.299, y, 0.000500
3, 0.299, 0.299, z

Determine x, y and z