Homework Help regarding Weibull Life Distribution

Weibull Life Distribution

There are 3 identical components with an exponential life distribution with failure rates , and 2 identical components with Weibull life distribution with shape parameters c and m. The components have been tested under normal conditions for 800 time units and the following results followed:

- One of the Weibull components was still functioning

- One of the components with Weibull distribution failed sometime between 300 and 450 time units

- One of the exponential components was still functioning

- One of the exponential components failed at 400 time units

- One of the exponential components failed at 300 time units

Write down the likelihood of the observations.

I understand this is using both exponential components and Weibull formulas and using Likelihood Ratio Tests of Hypothesis. However, I don't know where to even start. :( No need for an answer. Any guidance on starting point would be very helpful!