The feed rate to the circuit below (stream 1) is 450 tph and the apertures on the three screens are respectively 150, 25, and 15mm Screen Crusher i Sereen 2 71 Crusher 2 I 10 11 Sereen 3 a) What is the size distribution of the feed to screen 2 if screen 1 is working perfectly and the size distributions of the feed (streamt), and the product from crusher 1 are as follows (10 marks] Size (mm) 200 150 100 50 25 10 | Cum % passing for stream 1 95 50 45 30 25 15 Cum % passing for stream 4 100 85 60 55 40 | 25 b) Work out the flowrate of stream 8 in each size class if you are given the following information and you assume the screens are working perfectly [10marks] Size (mm) 50 25 15 10 Cum % passing for stream 3a 90 55 40 35 Cum % passing for stream 8 100 75 65 55