For questions 18 21 use the following information. "Website Design Associates" (WDA) provides website design services for small business. They have three types of potential customers: -Type 1: Small businesses without a need for secure online transactions Type 2: Small businesses with a need for secure online transactions, but no need for storage of customers' personal information Type 3: Small businesses with a need for both secure online transactions and storage of customers' personal information WDA's services come in three distinct versions: "Basic" : web design without secure online transactions "Intermediate" : web design with secure online transactions but no customer data storage "Extreme" : web design with secure online transactions and customer data storage All costs for Website Design Associates are relatively small and can be assumed to be zero. The marginal willingness to pay for the different customer types is given in the following table: Basic Upgrade to Upgrade to Intermediate Extreme Group Sizes Type 3 1,000 500 200 10 Type 2 700 100 100 20 Type 1 600 100 50 25 18. Suppose that Website Design Associates offers the following menu to all its customers: "Basic" for $500 "Intermediate" for $950 "Extreme" for $1,200 What does each Type 1 customer buy (if anything)? What is the total consumer surplus of all Type 1 customers? What does each Type 2 customer buy (if anything)? What is the total consumer surplus of all Type 2 customers? What does each Type 3 customer buy (if anything)? What is the total consumer surplus of all Type 3 customers