4.Liquid extraction is an operation used to separate the components of a liquid mixture of two or more species. In the simplest case, the mixture contains two components: a solute
(A) and a liquid solvent
(B). The mixture is contacted in an agitated vessel with a second liquid solvent
(C) that has two key properties: A dissolves in it, and B is immiscible or nearly immiscible with it. (For example, B may be water, C a hydrocarbon oil, and A a species that dissolves in both water and oil.) Some of the A transfers from B to C, and then the B-rich phase (the raffinate) and the C-rich phase (the extract) separate from each other in a settling tank. If the raffinate is then contacted with fresh C in another stage, more A will be transferred from it. This process can be repeated until essentially all of the A has been extracted from the B.Shown below is flowchart of a process in which acetic acid
(A) is extracted from a mixture of acetic acid and water
(B) into 1 -hexanol
(C), a liquid immiscible with water. 

Calculate 

E, and 

 R, using the given mixture feed rate as a basis and writing balances in an order such that you never have an equation that involves more than one unknown variable. (25%)