A group studied the relationship between breath rate of oxygen (Y) and age (X1), weight (X2), speed (X3), heart rate at rest (X4), heart rate at run (X5) and maximum of heart rate (X5). The data is given in the Table. Answer following questions using SAS or SPSS (see SAS demo examples). Y x1 x2 x3 x4 x5 x6 44.6 44 89 11 62 178 182 45.3 40 75 10 62 185 185 54.3 44 85 9 45 156 168 59.6 42 68 8 40 166 172 49.9 38 89 9 55 178 180 44.8 47 44 12 58 176 176 45.7 40 75 12 70 176 180 49.4 43 81 11 64 162 176 39.4 44 81 13 64 174 180 60.1 38 82 9 48 170 170 1) Fit a model of Y as predicted by X1, X2, X3, X4, X5 and X5. Write the model