WORTH 100 POINTS PLEASE HELP ASAP!! Joshua charges $12.50 an hour for his tutoring services. He also charges the same rate for giving guitar lessons.

On Saturday, Joshua drove to Eric's house to tutor him. To compensate for his traveling, Joshua charged a flat amount of $4.50 in addition to his hourly rates. For Saturday's session, Joshua earned a total of $35.75.
On Sunday, Joshua gave Ben guitar lessons for 0.5 hour and tutored him for the remaining time. A flat rate for traveling was not charged. For Sunday's session, Joshua earned a total of $31.25.
Complete the sentences.

Joshua tutored Eric Ben.

Joshua earned more on Saturday than on Sunday.