For how many days is the Hornbill Festival celebrated in Nagaland?

Consider the following statements regarding Baisakhi Festival: I. It is celebrated as the solar New Year in Punjab and marks the harvest of the Rabi crop. II. It commemorates the formation of the Khalsa Panth by Guru Gobind Singh in 1699. III. It is a lunar festival whose date varies significantly based on the Islamic calendar. IV. It is predominantly celebrated in southern India as a post-monsoon festival. How many of the above statements are correct?

Consider the following statements regarding Rongali Bihu (Bohag Bihu): I. It marks the Assamese New Year and is celebrated in April, signifying the onset of spring and the beginning of the agricultural cycle. II. It is primarily a post-harvest festival associated with winter feasting and is synonymous with Magh Bihu. Which of the statements given above is/are correct?