a$.$ What is the investment objective of VFIAX?

b$.$ What does the term "market efficiency" mean as applied to the U$.$S$.$ stock market?

c$.$ If an investor had invested $$10,000$ in VFIAX $10$ years ago, what would that investment have grown to by March $2024?$ What are the three largest economic sectors represented in VFIAX? What is the expense ratio associated with VFIAX?

d$.$ Which approach to mutual fund investing, passively$-$managed index funds or actively$-$managed mutual funds, relies on inefficiencies in the U$.$S$.$ capital markets? Explain your response.