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PS1. (10 points) Compute the weakest precondition for the following assignment statements and their postcondition. SHOW all steps to derive these ( 5 points off

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PS1. (10 points) Compute the weakest precondition for the following assignment statements and their postcondition. SHOW all steps to derive these ( 5 points off it not showing): b=5(1a);a=15b3(b>8) PS2. (10 points) Assume the following Javascript program: What are the values of x in Sub1 () and y in Sub3 () displayed when those functions are executed from main under dynamiccoping rules

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