5. The radius of curvature, p, of part of a sur- Tace when determining the surface tension of a liquid is given by:/ 3/2 2 dy 1+ dx =d d?y dr? Find the radius of curvature (correct to 4 sig- nificant figures) of the part of the surface having parametric equations 3 1 x=3t,y%3D-at the point t= =KLO t (b) x=4 cos' t, y=4 sin t at t==rad %3D [(a) 13.14 b) 5.196]