Using the stock_prices table in the stock_prices.db SQLite file that was provided, find the price change compared to the previous day using the "adj_close" column. Write SQL to output a table with five columns: the ticker (company symbol), date, adj_close, and new columns called prev_adj_close and price_change, sorted by ticker and then by date. The price change for the first day for any ticker will be null (as will prev_adj_close).