So I have literally no idea how to even begin this problem and would greatly appreciate some help :)

Thanks in advance!

cos fxn is shifted UP to midline 8 so r = 8

Amplitude is multiplied by 4 so m = 4

period is changed from 2pi to 8 so n : 8n=2pi n= 2pi/8 = pi/4

phase shifted by one to the RIGHT so p = 1

f(x) = 4 cos(pi/4(x-1)) +8 you should finish from here !

Thank you ! I got it :)