difference of fsk and fm

In FSK or FM modulation how we calculate the value of deviation frequency?

what is the relationship between deviation freq and signal bandwidth and final carrier freq?

frequency deviation (peak difference between instantaneous and carrier frequencies) i

in case of FSK F1-F2,
The numerical difference between the upper and lower frequencies of a band of electromagnetic radiation, especially an assigned range of radio frequencies.

carfr=(f1+f2)/2

what is the value Fcarrirer - F0 ? or F1 - Fcarrirer?

How we calculate this for a specified system?