bonjour
sommeil paradoxal = x
sommeil lent = 4 x
x + 4 x = 96
5 x = 96
x = 19.2
le sommeil paradoxal dure 19.2 minutes et le cycle de sommeil lent dure 76.8 minutes = 1 h 16 min 48 s
phase 1 = 76.8 : 16 = 4.8 min soit 16 min 48 s
phase 2 = 76.8 x 5/8 = 48 min
phase 3 = 76.8 x 5/32 = 12 min
phase 4 = 76.8 x 5/32 = 12 min