using matlab program please

1- Plot the following functions (you will need to decide on appropriate ranges for x): a- y = 1/x b- y =sin(x)cos(x), C- y = 2x2 - 3x + 1, Turn the grid on in all your plots, and remember to label axes and use a title. 2- Write a function to evaluate f(x; y) for any two user specified values x and y. The function f(x; y) is defined as: f(x, y) = x + y x>0 and y > 0 x + y2 x>0 and y 0 x2 + y2 x