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orders of reaction question

hi ya i am stuck on the following questions as i don't quite know how to work out the rate. It would really appreciated if someone could help. Thanks.

Find the orders of reaction with respect to conc D, E, F
Experiment Conc of D Conc of E Conc of F Rate of loss of D
1 0.1 0.1 0.2 4.4
2 0.1 0.1 0.4 8.8
3 0.1 0.05 0.2 4.4
4 0.3 0.1 0.2 1.32


Find rate respect to R and S
Experiment Conc of R Conc of S Rate of loss of S
1 0.2 0.1 1.6
2 0.3 0.1 1.6
3 0.4 0.4 1.4

sorry for the bad lay out of results for some reason TSR forum is not allowing me to have space between columns
compare two lines that have identical values except in one column then use the equation rate = k[D][E][F] to help you

for example expt 1 and 2 you double conc of F, rate doubles so 2rate = [2F]x => x = 1 so first order

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