Converting jetstream 31 to firefighting aircraft calculations

converting the aircraft jetstream 31 into a firefighting jet
basically taking off the aircraft seats and fitting water tanks it need to be scientific
with calculation of the tank capacity the aircraft weight and max.take.off weight and steps of modification.
I require a maximum of 10 pages of calculations, such as the change in center of gravity and scientific methods that can be used to do the conversion. I do not require lengthy explanations and written work, just mathematical and scientic steps with brief explanations to denote the steps. In addition i want 2 pages on the method used to cut the fuselage and 2 pages on a summarized cost evaluation with the inclusion of a chart, totaling 14 pages.
no referenceing needed
thank you