3 (a) Let A = (i) Use the adjoint method to find the inverse of A. (ii) Use the matrix inverse method and the result of (a)(i) to solve the system of linear equations 3x - 6x, = 2, 2x, + 3x, - 3, 4x - 2x3 = 4. -4 -2 8 (iii) Use the result of (a)(i) to find the inverse of B = -6 4 -2 8 0 (b) Let h: (0,00) -> R be a function such that h (x) =- 1-Ix for every x > 0. (i) Find all the relative extreme point(s) and point(s) of inflexion, if any, of h. (ii) Furthermore, if h(1) =6+1, find h