Refer to the data below and answer the ques ons that follow.

In a hostel building there are four rooms on each floor numbered 101 to 104 on the ground floor from le to right, 201 to 204 on the first floor from le to right, such that the rooms 101 is just below the room 201 and so on up to 401 to 404. The following informa on is also known:

I. None of the rooms is unoccupied.
II. No two rooms on the same floor have same number of students.
III. The number of students in room nos. 10X, 20X, 30X and 40X are all dis nct, where X = 1, 2, 3, 4. (e.g., for X = 1, 101, 201, 301 and 401 do not have the same number of students. Same holds true for X = 2, 3, 4).
IV. On the first floor number of students in each room is in the increasing order from le to right.