One spring day, Serenity noted the time of day and the temperature, in degrees Fahrenheit. Her findings are as follows: At 6 a.m., the temperature was 50° F. For the next 5 hours, the temperature rose 1° per hour. For the next 4 hours, it rose 3° per hour. The temperature then stayed steady until 6 p.m. For the next 4 hours, the temperature dropped 3° per hour. The temperature then dropped steadily until the temperature was 54° at midnight. On the set of axes below, graph Serenity's data.