Ethan wants to purchase some stock for the first time $.$ Which of the following is correct? Multiple Choice If he uses a commission order, he can lock in the price at which he wants to buy the stock His account executive should be encouraged to ignore Ethan's account due to its low value. His commission should be lower at an online broker than at a full$-$service broker His purchase price will exactly equal the number of shares he purchases times the average price per share and is known in advance. He should use an online broker to get professional help about purchasing stock