How does an agile team obtain clarity on backlog items that may be picked up in upcoming iterations?

Which database model is best used for data warehouse and data mining

Given int variables k and total that have already been declared, use a while loop to compute the sum of the squares of the first 50 counting numbers, and store this value in total. thus your code should put 11 + 22 + 33 + + 4949 + 50*50 into total. use no variables other than k and total.

Which one of the following is considered a peripheral? a software b mouse c usb connector d motherboard