How many mL of SCN^-1 and water to put in a 10 mL solution with 5 mL of Fe^3+ already in it?...

We're finding those values to make standard solutions of
0.00 mM FeSCN^2+
0.020 "
0.040 "
0.060 "
0.080 "
0.100 "

I know that you have to use M1*V1=M2*V2,but I'm not sure where to put what, or how to deal with mM in this equation.

We are also given the molarity of Fe3+ as 0.200 M, and SCN- as 2.00E-4

If someone could just show me the process of how to do one or two of them, I can do the rest.

Thanks!

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