well the only one i know i can answer is the last one and since we are following chance just getting a heads on a coin is 50% chance but if you want to get heads twice in a row that chance will be cut in half meaning you have a 25% chance to do so but since you want to test fate and do it a third time it would mean that your chance would be cut in half again... a whopping 12.5% chance to get heads 3 times in a row