Visit the Australian Stock Exchange website, www.asx.com.au and from "Prices and research" drop-down menu, select "Company information". Type in the ASX code "NAB" (National Australia Bank), and find out details about the company. Also, type in the ASX code "WBK" (Westpac Banking Corporation), and find out the details about that company. Both these companies belong to the financial sector. Information available in the ASX website will be inadequate for your purpose, you will need to search the internet for more information. Your task will be to get the opening prices of NAB and WBK shares for every quarter from January 2012 to December 2021 (unadjusted prices). If you are retrieving the monthly prices, read the values in the beginning of every Quarter (January, April, July, October) for every year from 2012 to 2021 (Total 40 observations). To provide you with some guidance as to what the unadjusted prices look like, two charts accompany this question obtained from WBK Share Investing, Australia. After you have researched share prices and financial sector, answer the following questions:

a) List all the quarterly opening price values in two tables, one for NAB and the other for WBK. Then construct a stem-and-leaf display with one stem value in the middle, and NAB leaves on the right side and WBK leaves on the left side. (Must use EXCEL or similar for the plot.) 1 mark