An electronics company is looking to develop a regression model to predict the number of units sold for a special running watch. Data is provided below:

Sales (units)	Price ($)	Advertising ($)	Holiday
500	100	50	Yes
480	120	40	Yes
485	110	45	No
510	103	55	Yes
490	108	40	No
488	109	30	No
496	106	45	Yes

A) Define the dummy variable(s) for the regression model.

B) What is the correlation between the Holiday categorical variable and sales?

Please identify the dummy variables and note the correlation between the Holiday categorical variable and sales.