（加试题）某同学编写一个VB程序模拟音乐播放器的“随机排序”功能。单击“随机排序”按钮Command1，随机生成15个“歌曲名”（歌曲名由3-6个大写英文字母组成），在列表框list1输出原播放顺序，在列表框list2输出随机排序后的顺序。运行界面如下：
实现上述功能的VB代码如下，其中加框处代码有错，请改正。
(1)________________________;
(2)________________________;
Private Sub Command1_Click()
Dim a(1 To 15) As String, b(1 To 15) As Boolean, c(1 To 15) As String
'数组a和数组c分别代表排序前后的文件名
Dim i As Integer, j As Integer, k As Integer
For i = 1 To 15 ‘生成各文件名，存放在数组a
k =Int(Rnd*5)+2 （1）
a(i) = ""
For j = 1 To k
a(i) = a(i) + Chr(65 + Int(Rnd() * 26))
Next j
List1.AddItem Str(i) + " " + a(i)
Next i
For i = 1 To 15
b(i) = False
Next i
For i = 1 To 15
k = Int(Rnd() * 15) + 1
Do While b(k) = True
k = Int(Rnd() * 15) + 1
Loop
b(k) = True
c(i) = a(k) + " " + "原位置" + Str(k)
Next i
For i = 1 To 15
List2.AddItem Str(i) + " " +str(a(i)) （2）
Next i
End Sub
