Q2&3 Please give a detailed explanation of both questions. Thanks!

2. Jacky wants to start making retirement savings. He plans to deposit $500 every month in an account that pays 6% annual percentage rate. Which of the following will increase the total amount of savings he can have at retirement? I. Invest in a different account that pays 6.05% effective annual rate. II. Invest in a different account that pays 0.75% monthly interest rate. III. Invest $250 every half month. IV. Retire sooner. A. I only B. II only C. II and III only D. I and IV only E. I, II and III only 3. Which of the following are examples of undiversifiable risk in the US market? I. Earthquake damages an entire town II. Federal government imposes a $100 fee on all business entities III. Employment taxes increase nationally IV. Toymakers are required to improve their safety standards A. I and III only B. II and IV only C. II and III only D. I and IV only E. I, III, and IV only