4. (20 points) For this question you can choose between using Excel or R. Using data from the Penn World Tables (Link: https://www.rug.nl/ggdc/productivity/pwt/), please complete the following: (a) Replicate Table (2.1) of the textbook, adding an extra column for the period 2010-2018. Comment on your findings. (b) Replicate Table (2.1) of the textbook, but for Canada instead of USA. Comment on your findings. Provide your Excel file or R script. Please see the footnote for hintsTABLE 2.1 GROWTH ACCOUNTING FOR THE UNITED STATES 1948- 1948- 1973- 1995- 2000- 2010 73 95 2000 2010 I Output per hour 2.6 3.3 1.5 2.9 2.7 Contributions from: Capital per hour worked 1.0 1.0 0.7 1.2 1.2 Information technology 0.2 0.1 0.4 0.9 0.5 Other capital services 0.8 0.9 0.3 0.3 0.7 Labor composition 0.2 0.2 0.2 0.2 0.3 Multifactor productivity 1.4 2.1 0.6 1.5 1.3 SOURCE: Bureau of Labor Statistics (2010). Note: The table reports average annual growth rates for the private business sector. "Information technology" refers to information processing equipment and software