Look at the diagram.

6 persons are sitting at the table.
Where is A? What is the position of B?
What is the place of E
A is on B's right side.
C is on the right side of D.
E is across from F.

( Are the expressions right? Can we remove 'side' in the two sentences?)

All look good, and yes, you can remove "side" if you wish.

The only thing missing is a question mark after "E" in the fourth sentence.

The expressions used in the given sentences are correct. However, to clarify the positions, we can use the word "side" in both sentences.

To determine the positions, let's analyze the given information step by step:

1. A is on B's right side: This means A is sitting to the right of B. In the diagram, find B and then look to the right. A should be in that position.

2. C is on the right side of D: This implies that C is seated to the right of D. Locate D in the diagram, then find the seat to its right. C will be seated there.

3. E is across from F: This tells us that E and F are seated opposite each other, facing one another. Look for F in the diagram, and E should be seated directly across from F.

If you follow these steps, you should be able to determine the positions of A, B, C, D, E, and F accurately.