Find the linearization L(x,y,z) of the function f(x,y,z) at the given points. * (x,y,z) = e + cos(y+z) a. (0,0,0) a. The linearization of f(x,y,z) at Po(0,0,0) is L(x,y,z) = (Type an exact answer, using a as needed.) b. The linearization of f(x,y,z) at Po |0.2. 2 is L(x,y,z) = (Type an exact answer, using it as needed.) c. The linearization of f(x,y,z) at Po |0. . 4 is L(x,y,z) = (Type an exact answer, using x as needed.)