(a) How many customers who did not have contact with employee are strongly satisfied?

(b) How many customers who had contact with employee are neutral?

(c) How do most customers who did not have contact with employee feel?

(d) How do most customers who had contact with employee feel?

(e) In which satisfaction category is the largest difference?

(f) Does the graph suggest that there is a significant difference between the customers who had contact with employee and those who did not?