Data was collected for 30 professional tennis players regarding their performance in Grand Slams (the four major tennis tournaments in the world).The response variable Win,expressed as a proportion ranging from 0 to 1,is believed to depend on two explanatory variables: the percentage of the Double Faults and the number of Aces.The following model is estimated: 
.A portion of the regression results is shown in the accompanying table. 
a.Predict the winning percentage for a player who had 20 double faults and five aces.
b.Interpret the slope coefficient attached to DoubleFaults.
c.Calculate the standard error of the estimate.If the sample mean for Win is 0.50,what can you infer about the model's predictive power?.
d.Calculate and interpret the coefficient of determination.
e.Calculate the adjusted R2.
Definitions:
Price-Elasticity Coefficient
A gauge for understanding how the quantity of a product demanded reacts to price adjustments.
Sales Quantity
The total number of units of a product or service sold within a specific period.
Demand Schedule
A table that shows the quantity of a good or service that people will purchase at various prices over a specified period.
Total Revenues
The total income received by a firm from its sales of goods or services, calculated by multiplying the selling price by the quantity sold.
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