Explain what parts of the presidential election process are explicitly established by the constitution

Aha! I learned this last year and i still remember. Well the election process f the constitution  left the method of  selecting Electors of the individual states, eventually they all got the right. In the first presidential election was won by George Washington  in 1789.

in 342 bc j._c. egypt fell into the hands of the persians, under the reign of nectanebo ii

greek city-states unite in a revolt against the persian empire at the beginning of the fifth century bc. j.-c  

from the year 660 or 659 bc ad, cyrus preached the revolt against the medes to deliver the persians.

i need !