Harry Potter and the Goblet of Fire - the 3 tasks?

Yes in the book it was dobby who gave Harry gillyweed, and Mad Eye just tried to give him hints on using a summoning charm for his broom, and on the maze, Professor Moody imperiused Krum so he wouldnt attack Harry, just Fleur and Cedric. "Mad-Eye" Moody which is actually Barty Crouch Jr. use Alastor Moody's eye to look through the maze hedges and stunned Fleur, there is a part in third task where he was asked a riddle which he answered spider.