4) From X = [18 4 10 5 3 12 8 15]; find indices of the elements greater than 5 by using an appropriate function. * Your answer 5) Y = [2 11 7 14; 5 87 4; 16 5 9 4]; Extract the fifth through the last elements of the first row. Your answer 6) X = magic(5); Extract the odd columns of matrix X and store them in matrix Z. * Your answer 7) Use an appropriate function to sort the elements of Y = [2 11 7 14 5 8 7 4 16 5 9 4] in descending order.

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