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matlab with bubble sort method to 10 the number of small to large, we will compare two adjacent numbers, will be transferred to the top of the small. Programming a function file, the following functions: Enter an array, its elements in descending order, the array output sorted the maximum demand of the array elements and find out its position in the original array. (3) has a matrix 45, seeking the maximum value and the programmed location. (4) programming requirements Σ_ (n 1) ^ 20▒ n! (5) there is a function f (x, y) x ^ 2+sinxy+2y, write a program that value, the output value of the input function arguments.