Question: (4) (5 pts) PDAs with two stacks are strictly more powerful than PDAs with one stack. Prove that 2-stack PDAs are not a valid model

(4) (5 pts) PDAs with two stacks are strictly more powerful

(4) (5 pts) PDAs with two stacks are strictly more powerful than PDAs with one stack. Prove that 2-stack PDAs are not a valid model for CFLs by giving an example of a language that is not context-free and yet accepted by a 2-stack PDA. Describe (no math necessary) how a 2-stack PDA would accept that language

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