6.Feistel proposed that we can approximate the ideal block cipher by utilizing the concept of a cipher, which is the execution of two or more simple ciphers in sequence in such a way that the final result or product is cryptographically stronger than any of the component ciphers.

Dean wants a quick way to look up staff members by their staff id. in cell q3, nest the existing vlookup function in an iferror function. if the vlookup function returns an error result, the text “invalid staff id” should be displayed by the formula. (hint: you can test that this formula is working by changing the value in cell q2 to 0, but remember to set the value of cell q2 back to 1036 when the testing is complete.)

When copying and pasting text, the first step is move your cursor type the text select the copy command select the paste command

In cell h5 enter a formula that will calculate the percentage of attendees that went to the altamonte springs job fair in 2018.