प्रसिद्ध ऐतिहासिक कृति 'तारीख-ए-फिरोजशाही' के लेखक कौन हैं?

The earliest literary mention of the spinning wheel (Charkha) in India is found in which medieval text by Isami?

The significant work on music titled 'Lahjat-i-Sikandar Shahi' was prepared during the reign of which dynasty of the Delhi Sultanate?