If the expected time of completion of a project is 60 weeks with a standard deviation of 5 weeks, the probability of completing the project in 50 weeks and 65 weeks respectively will be__________________?
A. 2.3% and 84.1%

B. 97.7 % and 15.9%

C. 97.7% and 84.1%

D. 15.9% and 97.7%

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