Two fair dice are thrown. The numbers on them are taken as \( \lambda \) and \( \mu \), and a system of linear equations
\( x+y+z=5 \)
\( x+2y+3z=\mu \)
\( x+3y+\lambda z=1 \)
is constructed. If \( p \) is the probability that the system has a unique solution and \( q \) is the probability that the system has no solution, then:
