George Kyparisis owns a company that manufactures   sailboats. Actual demand for George’s sailboats during each of the past four   seasons was as followed winter 1480,1200,1080,900 spring 1520,1420,1600,1580   summer 1040,2100,2040,1960 fall 680,770,650,500 George has forecasted that   annual demand fo his sailboats in year 5 will equal 5600 sailboats based on   the given data and using the multiplicative seasonal moel, the demand level   for georges sailboats in the spring of year 5 will be ?          t Year Season Demand   1 1 Winter 1480   2  Spring 1520   3  Summer 1040   4  Fall 680   5 2 Winter 1200   6  Spring 1420   7  Summer 2100   8  Fall 770   9 3 Winter 1080   10  Spring 1600   11  Summer 2040   12  Fall 650   13 4 Winter 900   14  Spring 1580   15  Summer 1960   16  Fall 500   17 5 Winter    18  Spring