C. Express the following to Mathematical symbol. 1. Rich Trimond is y years old now. What is his age 5 years from now? 2. Chris Fourth is twice as old as his brother now. What is her age 8 years ago? 3. A square has a side 4n - 3, what is the perimeter? His income is 3b + 5 every day. What is his total income in b days? 5. Christine is x years old now. What is her age year 2017? 4.​