Преобразуйте прямую речь в косвенную…

Преобразуйте прямую речь в косвенную, начиная предложение со слов автора. (Не said that …). 1. I’ll go on business. She’ll come 2. I’ll ring you up.You’ll get there. 3. The problem is very interesting. We spent so much time on it. 4. The wall is very high. The park is surrounded by it.