I'm having some trouble finding the log-likelihood in these questions:

Question 1

Pareto distribution is:

f(yt) = θ / (yt ^ (1+θ))

What is the log-likelihood, log L (θ)

Question 2

Geometric distribution:

f (yt) = θ (1 − θ)^yt, yt = 0, 1, 2, · · ·

where θ > 0, is an unknown parameter. Let {y1, y2, ..., yT } be iid observations from the geometric distribution.

What is the log-likelihood?

I also need to take derivatives of both. Would appreciate some help, I'm stuck!