Two products, A and B, are made in a three stage plant. The annual demand for A is 50,000 kg/year while for B it is 30,000 kg/year. The plant budgets a production year of 5000 hours. A production cycle of 500 hours is chosen and single product campaigns are undertaken. There is a 48 hour clean-up time between products. Processing times and size factors are as follows: Product Processing times h Size factors L/kg Stage 1 Stage 2 Stage 3 Stage 1 Stage 2 Stage 3 4 4.00 4.61 5.23 3 3.64 5.10 2.50 (15 marks) Determine the required vessel sizes 4. 2.