u 4.X1 ... n and Y1 ... m Strings (strings) are given. Our goal is with the least cost X1 ... n string Y1 ... m converting to string. Adding a new character costs up to TL, deleting an existing character It costs t dollars and converting an x character to a y character is f (x, y) dollars. Where k and t given positive integers, f (x, y) is a function with positive integers. a) (15 points) Write down the recurrence required to solve the problem using dynamic programming. b) (20 points) Pseudo code of the algorithm you designed with dynamic programming method (pseudo code) c) (15 points) Let k = 2, t = 1 and f (x, y) function given by the table below. (In this table the x variable column and y variable is given in the row.) By applying the algorithm you wrote down, the least Calculate the cost.

R 0 A 1 B 1 1 R 1 A 2 0 2 1 4 B 2 2 2 2 1 4 0 4 | 1 4 0 4 1 4 0