Hello! Can you please help me with these problems ? Im having a bit trouble with finance. Very poor english skills need help in america

A security has a cost of $1,000 and will return $2,000 after 5 years. What rate of return does the security provide? 1. Suppose California's population is 30 million people, and its population is expected to grow by 2% per year. How long would it take for the population to double? 2. Find the PV of an annuity that pays $1,000 at the end of each of the next 5 years if the interest rate is 15%. Then find the FV of that same annuity. 3. How would the PV and FV of the annuity change if it was an annuity due rather than an ordinary annuity? Use Question 3 inputs 4