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【简答题】
6月以来，我省普降大雨，山体滑坡灾害发生．北峰小学教学楼后面紧邻着一个土坡，坡上面是一块平地，如图所示：AF ∥ BC，斜坡AB长30米，坡角ABC=65°．为了防止滑坡 ，保障安全，学校决定对该土坡进行改造，经过地质人员勘测，当坡角不超过45°时，可以确保山体不滑坡． （1）求坡顶与地面的距离AD等于多少米？（精确到0.1米） （2）为确保安全，学校计划改造时保持坡脚B不动，坡顶A沿AF削进到E点处，求AE至少是多少米？（精确到0.1米）
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