Let y be the number of computers (in hundreds of units) produced/supplied in the last five months by a manufacturer, and let X be the market price (per unit in hundreds of S). Below are the data on Y and X. Month 1 2 3 5 Y (no, of computers supplied in hundreds of units) 4 6 6 7 8 X (price per unit in hundreds of $) 6 7 0600 8 a. Are these data cross-sectional or time-series data? Explain clearly. b. Which variable is the dependent variable, and which is the independent variable? c. Using the scatter diagram, investigate the relationship between the two variables. d. e. Find both the covariance and correlation coefficient estimates. Show your work. What does the correlation coefficient estimate reveal about the relationship between Y and X, and is it consistent with the law of supply?