Write and test a function called pow_of_two(num) that takes a positive integer num as input and returns another integer that is the largest power of 2 and is less than or equal to num. For example, 1, 2, 4, 8, 16, 32.. are numbers that are the powers of 2, but 3, 5, 6, 7, 9, 10.. are not.

Is it true that Grace Hopper is credited with the invention of the computer?

Computer Science When you are working in an organization, there will be different ways to communicate with your colleagues. based on this give at least 4 methods for team communication (one of the methods must be unique and creative way of communication. Using your own words, specify what type of information can be shared using the suggested method.

Computer Science Information Security Decode simple ciphering puzzles Solve the followings:   (HINT: This code uses base64 and the Caesar cipher)   UGRhIGx3b29za256IGJrbiBwZGEgeWR3aGhhamNhIGx3Y2EgZW86IHludWxwaw== Decode the following : Vigenere Code – Key Word Ym pyi kqw bbgy ckrbwkqutk xf cbiymswbt as r uqcnpv eijzi kjii dlzep xz xyg xgvhleb dm wvxmghp, rpl ioi dcrdymka wu vyi ewcavfxmgzmvu kdti wtwb alrv. Upyglu Ijyickch   Decode the following substitution cipher   S   W M B X   M B Q   X S Q E   X E H Q   X T H I B M D    X B R J G   X H R   S S S X S J J   L T   C B K A E Q,   L K Q   X B R J G   X H R   S O   X S J J   L T C B K A E Q   X S Q E   D Q S Y W D   H M G   D Q B M T D.