Students of Class \(8\) at a school organized a tree plantation drive in their school campus. A total of 100 students participated in the event, consisting of 40 boys and 60 girls.
During the drive, the students planted two types of plants: 30 Rose plants and 50 Marigold plants.
Based on the above information, answer the following questions.
1. What is the ratio of the number of girls to the number of boys in its simplest form?
2. What is the ratio of Rose plants to Marigold plants in its simplest form?
3. What is the simplest form of the ratio of the number of Rose plants to the total number of plants planted?
4. If 5 more Rose plants are added to the garden while the number of Marigold plants remains the same, what will be the new ratio of Rose plants to Marigold plants in its simplest form?