How do I find the initial rate of reaction for 4.)?

Question

2NO(g)+Cl2(g) ---> 2NOCl(g)

[NO] (mol/L) [Cl2] (mol/L) Initial Rate (mol/L * min)
1.) 0.20 1.) 0.10 1.) 0.63
2.) 0.20 2.) 0.30 2.) 1.92
3.) 0.80 3.) 0.10 3.) 2.58
4.) 0.50 4.) 0.50 4.) ???

Answer 1

I can't decipher the question.