A student tracked their time spent on hobbies for a week and made a bar graph. The 'Reading' bar showed 5 hours. The 'Sports' bar showed 8 hours. 'Gaming' showed 6 hours, and 'Art' showed 3 hours. What is the total number of hours the student spent on these hobbies?
To find the total, you must add the hours spent on each hobby: $5 + 8 + 6 + 3$.