Collins has a part-time job as a dog walker. The table below shows the amount of money Collins earned for different numbers of hours of work:
 Collins' Earnings from Dog Walking
 Number of Hours Worked Money Earned (dollars)
 5 30
 6 36
 8 
 66
 Part A: What are the missing numbers in the table? Show your work. (4 points)
 Part B: Collins also does part-time yard work. The ratio of the number of hours Collins works to the money he earns in dollars is 1:7. Create a table to show the money earned by Collins for 5, 6, and 8 hours of doing yard work. (3 points)
 Part C: How many more dollars does Collins earn doing yard work for 5 hours than working as a dog walker for 5 hours? Show your work. (3 points)