Apply Kingman's formula if inter$-$arrival times are $U[2,8]$ and service times are $$ Poisson$(4).$ Without another calculation, would the result be smaller, larger, or the same if:

service times were $exp(\frac{1}{4})?$

service times were constant, equal to $4?$

the service times were constant, equal to $6?$

the service times were $U[4,6]?$