Based on the tests, you should have an idea of what your method(s) need(s) to accomplish.
In the pseudocode section of your my_solution.rb file, identify the input and output.
Then write specific step-by-step ideas in code-like English to pass each test.
Each line should be something you can easily translate into code.
For help with writing pseudocode, take a look at this pseudocode standard example.
NOTE: Make sure your pseudocode is broken down to easily implementable steps.