Use the following partial table of a regression model, produced by a software package, to answer the questions below. Please show your calculations, where possible. DF of Model 3 7005.13 DF of residual 47 2770.15 a) How many observations are used for this model? b) How many parameters are used in this model? c) What is the R-square for this model? d) What is the F value of the model? e) Is the F value of the model significant at 5% level of significance? Why