有一组数据( □表示这个数字看不清):0.4□,0.65,0.58,0.77,0.58,0.8□,这组数的中位数是(),

0.4□,
0.58,
0.58,
0.65,
0.77,
0.8□
0.4□,0.65,0.58,0.77,0.58,0.8□,
这组数的中位数是(0.615),众数是(0.58),估计这组数的平均数大约是（0.65）.