A charity website collects donations for cancer research. They are considering a sponsored post on Facebook where they will pay $0.54 per click. Potential donors who click on the sponsored post in FB will get sent directly to the charity's website (not to the FB page) where they expect 4.5% of the visitors to make a donation. On average, their donations are $25. What is the ROI for this campaign? Should they pursue it? What is the key assumption of that your analysis in problem 3 makes? Explain it as you would to the director of the charity.