ou work for a building maintenance company. It is very important for the company to estimate as accurate as possible the time needed for maintenance of a building before submitting a bid. e cost that the company asks in its bids depend on this estimation. e company has already carried out the maintenance of different uildings and she established a table giving the surface area of each one and the time necessary for maintenance. ' ea (m2) Number of hours per week 320 400 260 388 32 5 284 22 7 180 12 5 Number of hours .] Using the graphic data, establishing a model describing the relationship between time paid for maintenance and area. c] The company must bid for the maintenance of a building of 56,000 m2. Estimate the maintenance time using the model you have integrated. d} Calculate the correlation coefcient. What you specify this coefcient