MatLab has left division the symbol \ and right division using the symbol/. What using is the difference? A. With matrices, the \ attempts to solve the system using Gaussian elimination. B. With scalars, A\B performs the operation B A C. With matrices, A/B performs element-wise division. D. A and B E. A, B, and C What are the final elements of the vector r of the following block of code? a = 2: b = 10: r = []: while(a