A long metal rod is bent to form a ring with a small gap if this is heated, will this gap increase or decrease?

A metal rod is shaped into a ring with a small gap. If this is heated, (i) the length of the rod will increase (ii) the gap will decrease (iii) the gap will increase (iv) the diameter gof the ring will increase in the same ratio as the blength of the rod

Two large holes are cut in a metal sheet. If this is heated, will their diameters increase or decrease?

Two large holes are cut in a metal sheet. If this is heated, will their diameters increase or decrease?

A thin cylindrical metal rod is bent into a ring with a small gap as shown in figure. On heating the system

A thin cylindrical metal rod is bent into a ring with a small gap as shown in figure. On heating the system

A thin cylindrical metal rod is bent into a ring with a small gap as shown in figure. On heating the system