The owner of a fast food restaurant is interested in determining if there is a relationship between wait time and number of items purchased. Perform the following to make a determination. a) Fill out the following extension table: Observation Wait Items (x ( x - x) (y ( x - x)2 ( x - x)2 1 2 time ordered - x ) y ) - y ) (x) (y) 5 6 2 6 9 3 4 3 4 4 2 5 5 11 Total b) Calculate r