Question: 2. Write a PDA for the language L2={w{2,1}w has twice as many 1 's as 2's }. In other words, if we treat 1 as

2. Write a PDA for the language L2={w{2,1}w has twice as

2. Write a PDA for the language L2={w{2,1}w has twice as many 1 's as 2's }. In other words, if we treat 1 as 1, the total of all the symbols should be zero. For example, 121L2, but 2121/L2. Please add a brief explanation of why your PDA works

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