concentration (g/l)	pressure	Temperature (C)	Conversion (%)
10	2	30	75.9
15	2	30	80.4
10	4	30	70.3
15	4	30	79.5
10	2	40	74.5
15	2	40	95.5
10	4	40	70.4
15	4	40	89.5

In a chemical reaction effects of three parameters on the conversion were investigated: concentration of the catalyst, pressure and temperature.

Visualize and evaluate the following dataset!

a) Do the different factors have significant effect? Does any interaction exist?

b) Plot the pressure-temperature interaction!

c) What is the estimated model?