Probability of independent events

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Sam is hunting a treasure. He is equally likely to travel along any pathway. His trip ends at 1, 2, 3, 4, 5, or 6.
1. What is the probability that Sam finds the treasure?
2. What is the probability that Sam does not find the treasure?
Claire rolls two 6-sided dice.
1. If Claire rolls two threes or two fives, then she will buy herself a donut. How many favorable outcomes are there?
2. What is the probability of getting at least one odd number?
3. If she rolls the two dice and adds the numbers together, how many times will the sum be 7?
Anna has 18 clothes in her closet. She has 6 shirts, 5 tees, 4 tanks and 3 sweaters. If she is taking 1 top from the closet randomly, what is the probability that:
1. She will take out a tee?
2. She will take out a shirt or a sweater?
3. She will not take out a shirt or a tank?
4. She will take out a sweater and a tee, if she takes out 1 item of cloth, puts it back and takes out a second one?