With the E-R Diagram below, how would I write this SQL query?

--27. Find the courses that can help most jobless people find a job position by training them toward the jobs of this --category that have the most openings due to lack of qualified workers.

Bryan Zheng Randy Phan Section Person Position PK c code takes PK per ld PK pos code emp_mode (required sll) pay rate PK year zip code complele date offered by format price ernail cate code phone hns skil has Knowledge Job_category PK e code PK k code PK cate code tite ks trle ks dosoription ks level title dosciptiorn pay range high pay range low (oore skill retail price Company PK comp id hires pimary secior NAICS Bryan Zheng Randy Phan Section Person Position PK c code takes PK per ld PK pos code emp_mode (required sll) pay rate PK year zip code complele date offered by format price ernail cate code phone hns skil has Knowledge Job_category PK e code PK k code PK cate code tite ks trle ks dosoription ks level title dosciptiorn pay range high pay range low (oore skill retail price Company PK comp id hires pimary secior NAICS