What materials were used to inscribe records during the Sangam Age?

What was the first capital of the Chola kingdom?

Read the following excerpt and answer the question that follows:

"The Sangam texts mention prominently only the ports of Musiri, Puhar (Kaveripattinam) and Korkai, the three great ports of the three great rulers of the timess."

(Source: https://www.du.ac.in/up/oads/new-web/04012023_Appendix-108.pdf)

Who founded Kaveripattinam, and why was it significant?

Name a Pandya ruler associated with the legend of Silappadikaram.