Š¿Žšƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
period of time =
1.
‘ã
2.
Šú
3.
’Z
4.
’Œ
ƒŒƒxƒ‹3.
•ÏX
SDAL“‡‰pŒêŠwZ