(a) The Cartesian coordinates of a point are (1, 1). (i) Find polar coordinates (r, θ) of the point, where r > 0 and 0≤θ< 2π. (ii) Find polar coordinates (r, θ) of the point, where r < 0 and 0 ≤ θ < 2π. (b) The Cartesian coordinates of a point are \((2 \sqrt{3},-2)\).(i) Find polar coordinates (r, θ) of the point, where r >0 and 0≤θ<2π. (ii) Find polar coordinates (r, θ) of the point, where r<0 and 0 ≤θ< 2π.