please answer these multiple choice questions asap. make sure your answers are correct and I promise to give you a thumbs up

1) An application of the STACK is a) Files stored in folders and subfolders b) Internet web browser stores recently visited sites, we return to most recently visited first c)TCP/IP packets being checked as they come into port. 2) To write the definition of a function template we specify type with a) templatecint I> b) int(template int) c) template d) template 3) To change the size of a vector named vec, use a) vec.change_size(5) b) vec resize(s) c) vec.scale(5) d) vec align(5). e) vector can't be resized. 4) In an array named arr of size 5, if we cout