Prove that for wff a, b of the system l, if {a) l в, then (a → b) is a tautology you can use theorems from class, if you reference them properly.

Your boss wants you to configure his laptop so that he can access the company network when he is on the road. you suggest a vpn connection to him. he is very concerned about security and asks you how secure vpn is. what do you tell him?

Assume that you have an sorted array of records. assume that the length of the array (n) is known. give two different methods to search for a specific value in this array. you can use english or pseudo-code for your algorithm. what is the time complexity for each algorithm and why?

You can apply several different worksheet themes from which tab?