QUESTION 4 Your friend is selling novelty t-shirts on Etsy. The t-shirts are currently priced at $40/shirt. Your friend is not happy with their current revenue stream and asks for your expert opinion. You estimate that demand for your friend's t-shirts is: Q = 1000 - 10Q (P = 100 - 0.1Q). If your friend is looking to maximize revenue, what should your recommendation be? Lower price to $25/shirt Raise prices to $80/shirt O Keep prices at $40/shirt O Lower price to $20/shirt O Raise prices to $50/shirt QUESTION 5