The following data were obtained from the adsorption rate, s, of acetone on carbon from an aqueous solution of molar concentration J at 18C, the data follow the Temkin isotherm =cln(aP), determine the values of the constants c and a.

J (mmoldm-3)	15.0	23.0	42.0	84.0	165.0	390.0	800.0
s (mmolg-1)	0.25	0.70	1.15	1.80	2.50	3.40	4.10

c=__________x10^-4 molg^-1

a=__________molg^-1