Problem 3. Let us set the parameter vectors in our bigram model as follows: 6;. = (0102,01) 6;. = {0.2.0.7. 01) - start = (0-5! 0'57 0) For example, given the current symbol a, there is probability 0.7 of transitioning to the symbol a, and probability 0.2 of transitioning to the symbol b. The third term in each vector is the probability of sentence ending after that symbol. Thus, given the current symbols :1 or b, there is probability 0.1 of the sentence ending. Using your answer to the previous problem and these parameter values, calculate the probability of the string oabb. Problem 4. In the previous problem we assumed that we knew the exact values of the parameter vectors 6'\