In a class of six students, ages are computed in whole numbers only and no two students are of the same age.
1. Mohan is a year older than Madan
2. Madan is two years older than Jaipal
3. Jaipal is a year younger than Sushil
4. Sushil is two years younger than Mohan
5. Ahmed is two years younger than Jaipal
Which one of the following given order the oldest to the youngest?