Statements followed by some conclusions are given below.

Statements:

1. X is 7 meters tall, Y is half as high and Z is 3 times the height of X.

2. P is taller than Z but shorter than A and B.

Conclusions:

I. B is the tallest of all.

II. The average height of X, Y and Z is less than 10 meters.

Find which of the given conclusions logically follows from the given statements.