 Complete the following phrase:  Based on Salasilah Raja-Raja Perak Perak Royal Genealogy, the Perak Sultanate was formed in the early 16th century on the banks of the Perak River by the eldest son of Mahmud Shah, the 8th Sultan of Malacca. He ascended to the throne as Muzaffar Shah I, first sultan of Perak, after surviving the 