Permutation or combination need help with both solving logic

12. A bank PIN is a string of four digits, each digit 0-9. How many choices are there for a PIN if the last digit must be odd and all the digits must be different from each other? 13. A bag contains 12 marbles. They are identical except for their color. There are 4 red marbles, 3 blue, 2 green, and one each of black, orange, and yellow. If they are drawn out one at a time, how many distinct ways can the be drawn