Michael Is seeking a job at different phone companies. He receives three job offers: AT&T offers $1500 per month plus $100 commission for everyone phone plan sold T-Mobile offers $1000 per month plus $150 commission for everyone phone plan sold Sprint offers $2000 per month plus $50 commission for everyone phone plan sold Let T represent the total monthly earnings, in dollars, and let n represent the number of phone plans sold. Which of the following statements are true ? Select all that apply