Andre W. answered 11/01/13
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A.) The wording is slightly ambiguous. Most likely, they mean between -1 and -2 standard deviations from the mean, which is just 13.59%. If, however, they mean within -1 and within -2 standard deviations from the mean, the answer should be "34.13% and 47.7%, respectively." You should ask for clarification.
B.) You are correct.