You have a text file called stocks. txt containing a stock symbol, a price, and the number of shares. Here are some sample lines of data: File stocks. txt AMGN 67.66 100 DELL 24.60 200 GE 34.50 100 HPQ 32.32 120 IBM 82.25 50 MOT 30.24 100 a. Using this raw data file, create a temporary SAS data set (Portfolio). Choose your own variable names for the stock symbol, price, and number of shares. In addition, create a new variable (call it Value) equal to the stock price times the number of shares. Include a comment in your program describing the purpose of the program, your name, and the date the program was written. b. Write the appropriate statements to compute the average price and the average number of shares of your stocks.