$[20$ points$]$ Consider the periodic signal defined by the following function:

$x(t)=5+2cos(10t)+4sin(30t)$

a$.[5$ points$]$ What is the fundamental frequency?

b$.[5$ points$]$ What is the fundamental period?

c$.[10$ points$]$ What are all of the non$-$zero Fourier series coefficients? $($Hint: no integrals needed$).$

Make sure it is correct and i need it soon