please answer

Let's say you have a 50% margin trading account, and you use all of your buying power to buy a stock. This stocks price falls by 50%. How much money did you lose? O 25% o 50% 75% 100% Instead of the scenario above, the stock's price instead increased by 50%. How much did you gain on your initial investment? 0 25% 50% o 75% 100%