An unbalanced six-side die is rolled once and the number on the top of the die is observed. Suppose that probability to get number 1 is twice as large to get number 2, and probability to get each of numbers 3, 4, 5, and 6 is 0.1. Let A be the event "the number obtained on the top of the die is odd (1 or 3 or 5)" Let B be the event "the number obtained on the top of the die is smaller than 5 (1 or 2 or 3 or 4)" a. The probability of event A is b. The probability of event B is

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