PLEASE HURRY!!

In the presence of a homogeneous catalyst of given concentration, aqueous reactant A is converted to product at the following rates, and CA alone determines this rate: CA,

mol/liter 1 2 4 6 7 9 1 2

rA, mol/liter hr0.06 0.1 0.25 1.0 2.0 1.0 0.5

We plan to run this reaction in a batch reactor at the same catalyst concentration as used in getting the above data. Find the time needed to lower the concentration of A from CA0=10mol/ liter to CAf=2mol/ liter.