Directions for questions 19-21: On the eve of Bathukamma festival, the association of Greenfield Apartments had organized games for children. As a part of that, Keerthi, Joshna, Pallavi, Rama and Swetha participated in a race. They got different ranks from 1 to 5 in the race (1 being the fastest and 5 being the slowest).

1. IKeerthi is not the person who finished the race first.
2. IIPallavi didn't get the 5th rank, but she finished the race after Keerthi.
3. IIIRama finished the race after Joshna.
4. IVThe sum of ranks of Keerthi and Swetha was equal to the sum of ranks of Pallavi and Rama. Among the five girls that participated in the race, who was the last to finish the race?