We start with an sqlite$3$ database named tech$\_$stocks.db$.$ The database has a table named dow$\_$stocks, which contains data on $9$ of the $30$ stocks that make up the Dow Jones Industrial Average. The table contains a primary key named sid, and columns for the company name, the exchange the stock trades on$,$ the stock symbol, the number of shares purchased, and the price paid when the individual shares of that stock were purchased. Do not change these column names: sid, company, exchange, symbol, shares, purchase$\_$price. Note the stock symbol for Apple is AAPL. In fact, make no modifications to this database.