题目

The soldiers went many dangers during the war against Japanese. 答案：【1】through3．如图，AF是△ABC的高，点D、E分别在AB、AC上，且DE||BC，DE交AF于点G，设AD=5，AB=15，AC=12，GF=6．（1）求AE的长；（2）求点A到DE的距离AG的长．