For each of the following vectors, find their length in the given inner-product space. Say if they are unit vectors, and if they are not, normalize them. (a) (1,2,0,2) in R4 with the usual dot-product. (b) sin(x) in C([-,π]) with the inner-product as in problem 2(c) (c) (1/√58,-2/√58,3/√58) in R³ with the inner-product (y) = x Ay with A as in problem 2.