can someone help me figure this out?

Consider the following sentence: "I was happy because I knew my mom was happy and because I knew I should feel happy, but I was not happy." a) Compute the bigram count table, C(w2w1) for the sentence. Put w1 in the left hand column, and w2 in the top row. Include punctuation, clitics, and sentence start and end markers as individual tokens, and index words using their lemmatized forms. (5 points) b) Compute them probability table, P(w2w1) assuming the following overall unigram counts: C(I)=2,C (was )=1,C (happy )=20,C (because )=10,C(knew)=80,C(my)=90,C(mom)=50, C( and )=20,C (should )=80,C( feel )=60,C()=10,,C( but )=80,C( not )=10. Assume there are 75 sentences in the corpus, and they all end with a period. (5 points) c) Compute the probability and perplexity of the first sentence in (a) using the bigram approximation. (5 points) d) Smooth the count table you calculated in (a) using Laplace smoothing, and recalculate the probability table as well. Assume V=30. (10 points) e) Recalculate the probability and perplexity of the first sentence in (a) using the smoothed table. (5 points)