Pet-Pro is a company that imports and markets pet food feeders to customers in Malaysia. The food feeder, which is called "Smart Feeder," allows pet owners to feed pre-determined quantities of food at pre-set times to their pets. The system has builtin webcam and Wi-Fi technology, allowing the pet owners to watch their pets from anywhere and at any time. It also has a voice recording system that allows the pet owners to record their voice. The manager of Pet-Pro would like to find out pet lovers' perceived value of such a product and the likelihood of their buying it. The manager of Pet-Pro wants to understand the advantages and disadvantages of using the following survey modes: 

(a) In-home interview, 

(b) Mall intercept, 

(c) Online survey, 

(d) Drop-off survey, and 

(e) CATI survey.