Please help asap

#2a). For which of the following pairs of goods and services would the cross elasticity of demand be positive or negative? (Indicate by stating positive or negative for each of the goods and service). a) Uber and Yellow Cab b) Movie streaming and subscriptions and tablets c) Camping tents and camping permits d) Bowling and Soft ball e) Textbooks and access codes for online homework #2b). Isabella always spends $50 on red roses each month and simply adjusts the quantity she purchases as the price changes. What can you say about Isabella's elasticity