Suppose that P dollars in principal is invested in an account earning 4.3% interest compounded continuously. At the end of 4 yr, the amount in the account has earned $1595.26 in interest. Part: 0/2 Part 1 of 2 (a) Find the original principal. Round to the nearest dollar. (Hint: Use the model A Pe and substitute P+1595.26 for A.) The original principal was approximately $ X 5 Part: 1/2 Part 2 of 2 (b) Using the original principal from part (a) and the model A-Pe", determine the time required for the investment to reach $15,000. Round to 1 decimal place. Using the original principal from part (a) and the model A Pe", it will take the investment approximately yr to reach X G