Please help me with solving questions (a) and (b). Provide all the steps to get to the final solution. Thanks a lot!

The below table shows unemployment rates [94]) in different EU countries in 2017 [the data comes from Eurostat). The countries have been grouped into three categories: Y = 1 for Nordic countries; Y = 2 for Central- and Western-European countries; and Y = 3 for other countries (a) State the Law of Iterated Expectations and verify it using the data. (b) State the Law of Total Variance and verif)r it using the data.