Will Tokyo Tower be repainted only once during President Trump's first term?
Tokyo Tower is repainted every five years. The last repainting began in 2018. Trump's first presidential term is from 2017 to 2021.
The answer is yes.

Would a duck ever need a Caesarean section?
A Caesarean section is a medical procedure in which surgery is performed to remove the baby from inside the mother. Ducks do not give live birth, they lay eggs.
The answer is no.

Has the Holy Grail been featured in at least five films?
1981's Excalibur film features King Arthur and his knights looking for the Holy Grail. Monty Python and the Holy Grail spoofs Arthurian legend. Indiana Jones and the Last Crusade features a search for the Holy Grail. Prince Killian and the Holy Grail focuses on retrieval of the grail. The Silver Chalice focuses on a man that has to sculpt the Holy Grail.
The answer is yes.

Were Greeks essential to crafting Egyptian Lighthouse of Alexandria?
The Lighthouse of Alexandria was an impressive monument in Egypt. The Lighthouse of Alexandria was built by pharaoh Ptolemy II. Ptolemy II was the son of Ptolemy I Soter. Ptolemy I Soter was a Greek bodyguard of Alexander the Great and became pharaoh of Egypt.
The answer is yes.