i ksut need the math for part b worked out

1. De-caffeinated coffee was first marketed in the early 1900 's but used carcinogenic solvents like benzene to extract the caffeine from the coffee beans. Today, supercritical carbon dioxide is the most widely used commercial method for extracting caffeine, but requires high pressure (>100 atm or 1500 psi). The most common solvent used in the laboratory for demonstration purposes is dichloromethane where the solubility of caffeine is 8.35 times that of caffeine's solubility in water. (2 pts) a. Draw (look up as needed) the structures of water, dichloromethane, and caffeine. Given the IMFs in each pure substance, and the IMFs in mixtures of each possible pair. Using these structures and IMFs explain/account for why dichloromethane and water are (mostly) immiscible, and why caffeine is so much more soluble in dichloromethane than water. b. A 100.0mL sample of cola with 10.0mg caffeine is extracted with 60.0mL of dichloromethane. What mass of caffeine remains in the cola after extraction