step by step please no excel

QUESTION: A hydrocarbon processing factory needs to forecast the demand for their products. The demand is understood to be related to awareness campaigning. Build a linear regression to develop an equation model to forecast for this product. The following tables shows four months data. nts Awareness Campaigning Sales Month (thousands (thousands of of units) $) 1 2.5 135 2. 1.3 250 3 1.5 298 4 1.8 275 Number your answers same as the question numbers below: Number your answers same as the question numbers below Show your step-by-step calculations. a) Which is the dependent (y) and independent (x) variable and why? (2 Points) b) Find the mean and standard deviations for x and y. (3 Points) Calculate the Pearson's correlation coefficient, "r"? Calculate the sample coefficient of determination,"2"? What does the value interpret? (10 Points) d) Find the intercept "a" and the value of slope "b" and write the regression equation. (10 Points)