draw and label given streams

2. A stream containing ethane, propane, and butane has a mass flow rate of 100.0g/s. a. Write an expression for the mass fraction of propane, xp, in terms of the mass fractions of ethane and butane, xe and xb. b. Write an expression for the molar flow rate of ethane, nE (lb-mole CH/h), in terms of the mass fraction of this species, xE