2. Ana and Bojan agree to play such a game: First, Ana says a number from 1 to 7 (including 1 and 7), then Bojan adds one of the numbers between 1 and 7 (including 1 and 7) to the number said and states the sum, then Ana does the same, and so on. The winner is the one who first says the number 100. Can Ana be sure that she will be the first to say the number 100 with the right choice of the first number, or if she makes a mistake once, can Bojan win? How should Ana play to win? Can Bojan win in the game, and if so, explain how?