visaul basic

Private Sub Command11_Click（）a = 1：b = 1：k = 1Do while k <= 5c = a + ba = bb = ck = k + 1LoopMsgBox“c =”＆cEnd Sub

c = 5
c = 7
c = 8
c = 13

你想表达什么，代码写整齐一些，中文标点改用英文的，格式整理下。
这代码是算斐波那契数列的，有什么问题么

Private Sub Command11_Click（）a = 1：b = 1：k = 1Do while k <= 5c = a + ba = bb = ck = k + 1LoopMsgBox“c =”＆cEnd Sub输出结果是什么？

1. c = 5
2. c = 7
3. c = 8
4. c = 13