1. Using Θ-notation, provide asymptotically tight bounds in terms of n for the solution to each of the following recurrences. Assume each recurrence has a non-trivial base case of T(n) = Θ(1) for all n no where no is a suitably large constant. For example, if asked to solve T(n)-2T(n/2) + n, then your answer should be Θ(n log n). Give a brief explanation for each solution. Giving only the upper or lower bound (using big-oh or big-Ω notation) may be worth partial credit. (a) T(n)-8T(n/2)+13 (b) T(n) = 5T(n/3) + n (c) T(n)=T(n-1) + ㎡ (d) T(n)=T(n/2) + 2T(n/5)+n