Using Matlab

1. In a single instruction, change all values from the diagonal of a square matrix to zero. 2. In a single instruction, replace all the values of the diagonal of a square matrix with the elements of a given vector. 3. Sort the elements of a matrix from minor to major while maintaining its shape (indication: use the reshape command. 14 4. In a single instruction, reset all the negative elements of a matrix. 5. In a single instruction, reset all the elements of a matrix that is in between -1 and 1. (The logical conjuntion is &). 6. In three different ways (each in a single instruction), find out the number of ele- of a matrix, so that in the end we have a number.