How do you find the initial rate????? this is the second time Im posting this question, please answer only IF YOU REALLY KNOW HOW TO ANSWER! THANK YOU!

The table below shows average values of glucose product concentrations [P] in mM obtained at various times for a pure saccharase (EC 3.2.1.26) acting on sucrose in reactions run at five different initial substrate concentrations [So] in mM. All other reaction conditions, except for the [So] were similar for the reactions. Time (minutes) [So] = 10 mM [So] = 15 mM = = [SO] = 25 mM [SO] = 40 mm 0 0 0 0 0 1 1.03 1.08 1.12 1.15 2 2.10 2.15 2.19 2.23 4 4.04 4.22 4.30 4.36 6 6.06 6.25 6.44 6.55 a. Estimate the initial rate, Vi, at each initial substrate concentration assuming that only the data obtained during the first 4 minutes are linear. b. Estimate the Km and Vmax for the saccharase hydrolysis of sucrose