You can use the online map here to check the routes to the sites:
red pin: Naqsh-e Rustam
oprange pin: Naqsh-e Rajab
blue pin: Persepolis
violet pin: Pasargadae
Persepolis from 8:00 to 17:00
Naqsh-e Rustam from 08:00 to 17:00
Pasargadae from 08:00 to 17:00