let a message signal mt have a bandwidth of 10

Question

Let a message signal m(t) have a bandwidth of 10 kHz and a peak magnitude of 1 V. Estimate the bandwidth, by using Carson's rule, of the signal
u(t) obtained when m(t) modulates a carrier with a peak frequency deviation of:

(a) f_d = 10 Hz/V.

(b) 100 Hz/V.

(c) 1000 Hz/V.