Two bar magnets suspended by string, are separated by a piece of metal. Which of the following statements best explain the outcome shown in the diagram?

When Asha suspended four bars of different materials from a pole and brought the North pole of a bar magnet near part $P$ and $Q$ of each bar one by one as shown in the figure, the observations she recorded are as follows: 

Which of the following sets correctly represents metal bars $\mathrm{I},\mathrm{}\mathrm{I}\mathrm{I},\mathrm{}\mathrm{I}\mathrm{I}\mathrm{I}$ and $\mathrm{I}\mathrm{V}$?

Arun suspended a bar magnet on a string as shown in the diagram below. He brought $3$ bar-shaped objects $P,Q$ and $R$ towards the bar magnet. He placed the ends ( $X$ and $Y$) of each object, near the north pole of the bar magnet and recorded his observations in the table below.

Which of the object(s) is/are the magnet?

A matchbox containing an unknown object is placed on a thin sheet of glass in the experimental set-up shown in the figure.

When the bar magnet moves, it is able to drag the match box along. What is most likely to be found in the matchbox?

What will happen when three bar magnets are hung in the manner as shown below?