A tourist center is open on weekends (Friday, Saturday, and Sunday). The owner-manager hopes to improve scheduling of part-time employees by determining seasonal relatives for each of these days. Data on recent traffic at the center have been tabulated and are shown in the following table: Week 1 2 3 4 5 6 Friday Saturday Sunday 132 142 142 142 147 152 242 242 252 252 267 267 152 152 162 162 162 172 a. Develop seasonal relatives for the shop using the centered moving average method. (Round your intermediate calculations and final answers to 2 decimal places.) Friday Saturday Sunday b. Develop seasonal relatives for the shop using the SA method. (Round your intermediate calculations and final answers to 4 decimal places.) SA Index Friday Saturday Sunday