5. Elmer wants to grow Blue Spruce trees to eventually sell as Christmas trees. He plants 25 trees the first year, and then increases the number of trees he plants each year by 15. a. In which year will Elmer plant 220 trees? (2 marks) b. How many trees will Elmer have planted in total after 10 years? (2 marks) 6. Determine the number of terms in the series below. (2 marks) 1 5 9 -+...+ - 192 = 315 2 2 2 2