Which of the following statements are true?
(i) The orbit of a planet is elliptical with the sun at one of its foci
(ii) The line joining the planet and the sun sweeps equal areas in equal intervals of time
(iii) The square of the mean distance of a planet from the sun is proportional to the cube of its orbital period
1
Only (i) and (ii)
2
Only (ii) and (iii)
3
Only (i) and (iii)
4
(i), (ii) and (iii)