5.
Answer:
The Z particle becomes a quark
and it's antiquark. The energy
in the strong field produces
more quark-antiquark pairs,
which then form hadrons.
See the Production of Charm Particles via the
annihilation
of an electron and positron.
6.
Answer:
The same thing happens as in #5,
except that a radiated gluon
causes the third cluster of particles.
