In a waiting line situation, arrivals occur, on average, every $12$ minutes, and $10$ units can be serviced every hour. What are $\backslash$lambda and $\backslash$mu $?$

Question $15$ options:

a$)$

l $=5,$ m $=5$

b$)$

l $=5,$ m $=10$

c$)$

l $=10,$ m $=5$

d$)$

l $=10,$ m $=10$