please give me a hand with this digital signal processing question.

and please show every step, that way i can learn from it, thank you.

2. Consider the equation x(n) = Cos (nt * n/16). a) What is the sample period in radians/sample? (1 mark) b) What is the sample period in cycles/sample? (1 mark) c) If the sample rate is 24k samples/second, write an equation for the analog input signal x(t) (1 mark)