Why does the minimum point of AC curve fall towards right of AVC curve ?

Why does the minimum point of AV curve fall towards right of AVC curve ?

On the basis of given diagram, answer the following question: (i) Identify the three short-run cost curves. (ii) Why all the three curves are U-shaped ? (iii) Why does the distance between curve A and curve B fall with rise in output ? Will they coincide at any level of output? (iv) Why does the minimum point of curve A lie to the right of minimum point of curve B.

Minimum point of MC curve comes before the minimum point of :

Why does the SMC curve cut the AVC curve at the minimum point of the AVC curve?

Under which condition the oxygen dissociation curve will move towards the right ?