7 A sequoia tree that was 2.6 m tall when it was planted in 1998 grows at a rate of 1.22 m per year. A Write down a formula to represent the height of the tree each year, with a, representing the height in 1998. B Find the height of the tree in 2025. C The tallest living sequoia tree, the General Sherman tree in the US Sequoia National Park, has a height of 84 m. In what year would the tree planted in 1998 reach this height if it continues to grow at the same rate?