Please answer all 3 questions

Continue using the same environment for this question: Sheila lives for two periods. She earns $100 in the first period and $110 in the second period. She wants to consume exactly the same amount in both periods. The interest rate at which she can save and borrow is 10%. There is no inflation. Which of the following statements is true? A. Sheila's lifetime consumption is greater than her lifetime income B. Sheila's lifetime consumption is lower than her lifetime income C. Sheila's lifetime consumption is equal to her lifetime income QUESTION 12 10 points Continue using the same environment for this question: Sheila lives for two periods. She earns $100 in the first period and $110 in the second period. 'She wants to consume exactly the same amount in both periods. The interest rate at which she can save and borrow is 10%. There is no inflation. Now suppose that Sheila's first-period income goes up by 5%. What is her marginal propensity to consume? Provide your answer as a decimal number, not a percentage, and approximate it to three decimal places (i.e., if your answer is 0.876, type in "0.876", not "87.6%"). QUESTION 13 10 points Continue using the same environment for this question: Sheila lives for two periods. She earns $100 in the first period and $110 in the second period. She wants to consume exactly the same amount in both periods. The interest rate at which she can save and borrow is 10%, There is no inflation. Next, let the income be again at $100 in the first period and $110 in the second period. Suppose that the interest rate jumps to 50%. How much does Sheila borrow in the first period? Approximate your answer to three decimal places