Write a Python program that creates the three lists shown above with the three social security numbers, names and debts (like 5$) of each; call them K, N and S. Then write a function browse (SN, K, N, S) which has an ID number to look up and the three lists as parameters. The task is to write out the name and debt of the person who is looked up, or "not found" if he is not found.

Assume you are given a sequent XF A in Propositional Logic and you are able to derive, using Natural Deduction, both some formula B from X as well as its negation ¬B. Assume that the rule RAA is not available to you, otherwise all Natural Deduction rules we taught can be used. • Can you infer any property (satisfiable, unsatisfiable, tautology) of the formula A1 A... A An, provided X = {A1,..., An}? • Can you say anything about the validity of the sequent? Does its validity depend on which formula A represents? • In which way does the fact that we don't have RAA available influence your response?

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The decimal value that equivalent to (101100) which is represented in 2's complement is: b.-12 d. -20 a. 52 OC 12