Without thinking about technical probabilities, if you were to flip a coin three times and land heads all three times, would you think the coin is more likely to land on tails than heads on the 4th flip? (opinion question)

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.