Q1) A contestant rolls a die and receives $5 is it is a 4, $5 if it is a 1, and pays $2 if it is anything else. What is the expected value of each trial? Q2)An investor hopes to triple his investment in 10 years. What interest rate must his investment earn in order to achieve this goal? (assume it is compounded monthly). Q3)How much should you invest now at 6.5% compounded quarterly to have $35,000 toward the purchase of a car in 5 years? Q4)A loan of $7,500 was made for 6 years. The simple interest paid was $225. What was the interest rate? PLEASE HELP ME WITH THOSE QUESTIONS AND IF YOUCOUDE SHOW ME THE EQUATION FOR QUESTION. THANKS