Read an advertisement
Read a product advertisement on one of your web surf experience. Identify the value and the target audience of the product. Identify the cost of advertisement. Identify the cost for producing materials and research/design. Explain whether you think the product will be accepted by its target audience.
Bonus question 1
Suppose you are the founder of that effort. Suppose you carry the entire development cost yourself and the idea will not attract any investor support. Write a business plan for yourself.
Bonus question 2