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Let X : {a,b,c,d,e,f,g,h}. Compute each of the following. (a)[10 points] Compute the number of strings of length 8 over X, repetitions allowed, starting with

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Let X : {a,b,c,d,e,f,g,h}. Compute each of the following. (a)[10 points] Compute the number of strings of length 8 over X, repetitions allowed, starting with aa. (b)[10 points] Compute the number of strings of length 8 over X, with no repetitions, ending with ab or ac. You must justify your work at each step

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