3. (W) On January 1, 2023, the market capitalization of Firm A was 5 billion dollars, and it increases by 20% every 5 years. On that same day, the capitalization of Firm B was 20 billion dollars, and it has a half life of 4 years. (a) Find a formula for A(t), the market capitalization (in billions of dollars) of Firm A, t years after January 1, 2023. (b) Find a formula for B(t), the market capitalization (in billions of dollars) of Firm B, t years after January 1, 2023. (c) When will the market capitalizations of the two firms be equal