Š¿Žšƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
period of time =
1.
—r
2.
•‰
3.
Šú
4.
Ž€
ƒŒƒxƒ‹3.
•ÏX
SDAL“‡‰pŒêŠwZ