помогите сделать номер 6,нужно перевести в косвенную речь!

1.       The teacher of biology said that ecology was a new important science. It concerned everybody. 2.       Then he told that ecology dealt with the protection of environment and everyone had to know the general ideas of it. 3.       Asel asked teacher how we would be able to use it in practice. 4.       The teacher answered that we would be able to do many useful things. We would be able to help to preserve plants and young tree, birds and animals. They need our help. 5.       Kate told the teacher that she agreed with him, but many people didn`t understand the importance of the problem. Even more, they did much harm to the environment. 6.       The teacher said that that was right.