a. Explain why a shorter-term moving average is considered to be a "faster" moving average and a longer-term moving average is considered to be a "slower" moving average.
b. Sophia says that she is watching a 10-day SMA and a 60-day SMA of her favorite stock, and she is planning to purchase the stock when the 10-day SMA crosses above the 60-day SMA. Explain the rationale for Sophia's strategy.