How does the mutual inductance of a pair of coils change when
number of turns in the coils is increased?

How does the mutual inductance of a pair of coils change when: The number of turns in each coil is decreased.

How does the mutual inductance of a pair of coils change when (i) distance between the coils is increased and (ii) number of turns in the coils is increased?

How does the self inductance of an air coil change, when the number of turns in the coil is decreased?

How does the mutual inductance of a pair of coils change when distance between the coils is increased and

How does the mutual inductance of a pair of coils change when: The distance between the coils is increased