Respuesta :

Answer:

See below ~

Step-by-step explanation:

(a) No. of ways :

  • 9! ways
  • 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1
  • 72 x 63 x 20 x 6
  • 1540 x 378
  • 582,120 ways

(b) No. of ways :

  • 9 x 8 x 7 x 6
  • 72 x 63
  • 4,536 ways