Arrange the jumbled letters to answer the following questions below.
16. It is the music for lower classes or for the general public. (GSIOMKNA)
17. One of the modes of Japanese Vocal Music. (OSYNE)
18. It is where the skilled singers and drummer perform in Korean Vocal
Music. (NOIAPSR IMSCU)
19. It is a big drum in Japanese instrument. (IOAKDO)
20. A Chinese instrumental music which is an elongated-trapezoid with 13
to 21 strings stretched over individual oridges. (HGNEZ)​