You have access to data from a conjoint analysis survey of tablet PCs similar to the one that you filled out earlier in the course. This survey, instead of testing the idea of a built-in projector, was designed to test the idea of a virtual keyboard. The partworths estimates from a sample of consumers are provided to you in a separate spreadsheet available on Canvas (see below). You should compute willingness to pay (WTP) based on the conjoint partworths, assuming a price increase from a baseline of $500 (i.e., the "exchange rate" should be based on the partworth for $600 vs. $500), and assuming that the baseline for the keyboard is Touch (i.e., the utility for the virtual keyboard should be based on the partworth for Virtual vs. Touch). Suppose Toshiba decides to sell a virtual keyboard as a separate accessory compatible with most tablet PCs. In all questions below, assume a marginal cost of $50. Note: the conjoint analysis survey assumed that the virtual keyboard was built into the tablet PC. a Pricing Concept Check Data.xlsx Assume that WTP for the virtual keyboard is the same when it is sold as an accessory vs. built in. Based on the results of the conjoint analysis survey, which of the following prices for the virtual keyboard as an accessory would give rise to the highest contribution for Toshiba? a) $125 O b) $150 c) $175 O d) $200