the answers are C and B. how to solve the question though?

(Answer Questions 5 to 6 using the following information) The market value of Dillon's Corporation's common stock had become excessively high. The stock was currently selling for $240 per share. To reduce the market price of the common stock, Dillon's declared a 3-for-1 stock split for the 200,000 outstanding shares of its $15 par common stock. 5. What is the number of common shares outstanding after the split? A) 200,000 B) 400,000 C) 600,000 D) None of the above 6. What is the par value per common shares outstanding after the split? A) $10 B) $5 C) $15