Hello, can you please help me solve these in detail step-by-step? Thank you in advance!

1. If oil is being consumed at a rate of 2.3% per year, how long does it take to consume one half of all present oil reserves? How long will it take to deplete 90% of all the reserves?
2. Population of mosquitoes grows exponentially at a rate of 58.8% per year. How long does it take for the mosquito population to double in size?
3. A certain insect population grows exponentially at a rate of 2% per year. The initial population was 500 insects. How long does it take for the population to triple in size?