Answer:
[tex]let \: m < j \: be \: \beta \\ \tan( \beta ) = \frac{15.1}{9.4} \\ \beta = { \tan }^{ - } ( \frac{15.1}{9.4} ) \\ \beta = 58.1 \degree \\ m < j \: = 58.1 \degree[/tex]
