60. Birch syrup is produced in a manner similar to maple syrup. A processor starts with birch sap having a solids content of 1.1% by weight with a specific gravity of 1.004. This will be "boiled down" to get a 66.5 Brix syrup with a specific gravity of 1.328. (8 marks total) a. How much of the starting sap would be needed to obtain 135 litres of the 665 Brix syrup after the "boiling down" process? (Express your answer in litres to one decimal place). (4 marks) b. How much water is removed in the process? (Express your answer in litres to one decimal place). (2 marks) 0. What is the ratio of sap to syrup from this process? (Express your answer as the number of litres of sap required to obtain 1 litre of