Media Spend $80,000 Impressions 2,500,000 Search Ad Campaign Clicks 110,000 Purchases Revenues 2,000 $800,000 Display Ad Campaign Media Spend $75,000 Impressions 25,000,000 Clicks 8,000 Purchases 800 Revenues $600,000 a. (2 points) Compute the CTR and conversion rate (TCR) of each campaign. Show your work such as formula and any intermediate steps used. I b. (1 point) Compute the cost per conversion (CPA) for each campaign. Show your work such as formula and any intermediate steps used. c. (2 points) Assuming that all purchases resulting from clicks can be attributed to the respective campaigns, which campaign offers the higher ROI or, equivalently, ROAS (Return on Advertising Spend)? Why? Show your work such as formula and any intermediate steps used