Answer
See the explanation.
Work Step by Step
Leptons and quarks are $\frac{1}{2}$ spin particle that undergoes interaction .
However leptons have fixed mean life but quarks have variable mean life .
Leptons have integral changes as 0 or negative (-) while quarks have fractional changes either minus -1/3 or 2/3 important differences that quarks occurs in cluster of two or three quarks have strong binding force impossible to break and and observe them separately which such thing does not exist with leptons.
