The percentage of marks obtained by seven girls G1, G2, G3, G4, G5, G6 and G7 in a class are compared. All the girls have obtained different percentages of marks. G4 has the lowest percentage. G3 has a higher percentage than G5, but less than G1. The percentage of G6 is less than G2. G7 has the highest percentage. G1 has a percentage greater than only three girls.
 Who has the third lowest percentage?