Please help me asap please

If t is a vector, how do you assign the following vector in Matlab. Vector P is formed based on element by element operation. P= (t^2- squareroot 5)/sin(t) >> P = t^2- squareroot (5)/Sin(t) >> P = (t^2- squareroot (5))/sin(t) >> P= (t.^2- squareroot (5)) ./sin(t) Write a MATLAB statement to generate the variable Z. Here x is a VECTOR. Avoid redundant operators. (x) = 4x^3cos (2x^5-5x) >> = 4* x * 0.3 .* cos(2* x*0. 5 - 5* x) >> = 4* x^3 .* cos(2* x.^5 - 5* x) >> = 4* x.^3 .* cos(2* x.^5 - 5* x) >> =4.* x^3 .* cos(2.* x^5 - 5.* x) How do we create a new directory called "Projects" inside the current directory? >> make projects >> mkdir Projects >> make Projects >> pwd Projects How do you list all the folders and files inside the current directory in Matiab? >> what >> Is >> dir >> Both b and c are correct