Write a new class called FertilisedTree, which is a more specialized version of the Tree class defined in Chapter 3, and modified in Exercise 3.14. A FertilisedTree differs from a Tree only in the way...

Write a new class called FertilisedTree, which is a more specialized version of the Tree class defined in Chapter 3, and modified in Exercise 3.14. A FertilisedTree differs from a Tree only in the way it grows. In the case of a FertilisedTree, when the height of the tree is greater than 1 metre, the growth rate decreases by 5% (as opposed to 10% in the case of a Tree). Only when a FertilisedTree reaches a height of 3 metres or more, does the growth rate decrease by 10%. Write a main method which creates one Tree and one FertilisedTree object, both with an initial height of 0.1 metres and growth rate of 20 cm/year. Allow both trees to grow for 30 years. Print out the height of both trees after the 30 years. (Hint: to access the height and rate attributes of Tree, change them to have protected access in class Tree.)