7. (20 pts.) Matlab Syntax Consider an arbitrary sized matrix A. "A command" means a single-line command. a. A command that extracts the 1x1 upper left element of matrix A. b? b. A command that extracts the 2x2 upper left corner of matrix A. b-? c. A command that extracts all the odd numbered rows of A. b-? d. A command that rearranges a rectangular matrix A into a column vector b. b? e. A command that changes the rows of matrix A into columns. (Thus, the 1st row of A becomes the 1st column, the 2nd row of A becomes the 2nd column, and so on.) A-? f. A command that reverses the order of the rows of matrix A. (Thus, the last row of A becomes the 1st row, and so on.) A-? g. A command that assigns the multiplication table to matrix A. A-? h. (4 pts.)A command that places the first 51 terms in the Taylor's series expansion of cos(x) into vector b. be? (Taylors's expansion formula for cos(x) is ?-o-(-1)X(211(2"i)! The first element of A is 1; 2nd element is -xA2/21; 3rd element is x*4/4!; up to the 51th element.) i. A command that evaluates cos(x) with the first 51 terms in the Taylor's series expansion. cosx