Why do you know this is premature? On the other side, how many focus groups are enough to support a marketing plan?

Marketing research

What is involved in marketing research and why companies use it?
Describe how it is used each of the following marketing research methods:
Perceptual mapping for positioning
Scanner data for pricing and coupon experiments and brand switching
Surveys for assessing customer satisfaction
Focus groups for concept testing
Cluster analysis for segmentation
Conjoint analysis for testing attributes
Assume you are a top-level manager and decided to use a single focus group. You get excited you will know what some customers say, and be able to prepare a marketing plan with the results. Why do you know this is premature? On the other side, how many focus groups are enough to support a marketing plan?
Imagine designing a conjoint analysis for an ice-cream parlor. In particular, you’re in charge of the phone and curve orders. While they’re a simple foodstuff, they can be created in many combinations. What factors should you test in terms of your customers’ likely preferences? Design a conjoint analysis that would result in identifying 2 or 3 popular combinations that your customers could order every day. Which combination would make your customers most satisfied?

Please can you identify each question on the paper with the number or the actual question