A gas containing 79.1% N2, 1.7% O2, and 19.2% SO2 is mixed with another containing 50% SO2, 6.53% O2, and 43.47% N2 to produce a product gas containing 21.45% SO2, 2.05% O2, and 76.50% N2. All compositions are in mol%. Determine: a) How many independent stream variables there are in the problem b) How many material balances can be written and how many of them will be independent c) The ration in which the streams should be mixed