Matlab please help me asap

G = [4, 7, 0, 15; 5, -1, -3, 0; 6, 2, 17, 16] creates____ matrix 3 by 4 4 by 3 3 by 3 Write the command to find cosine in radians of a values. Assign these values to aa >> aa = cos(a) >> aa = cos d(a) Write a command to determine the number of elements of vector X. >> dim(X) >> size(x) >> length(X) If X = (2; -1; 0), Y - [x; 5; 0] will be a ___ vector. 1 by 3 3 by 1 5 by 1 6 by 1 Build a "row" vector m that has five elements, each with the value 0. >> m = zeros(S) >> m = zeros (1, 5) >> m = zeros(5, 1)