实现上述功能的VB程序如下，请在划线处填入合适的代码。

Private Sub Command1_Click()

Dim a(1 To 10) As Integer    ‘存储0~9每个数字出现的次数

Dim b(1 To 26) As Integer    ‘存储a~z每个字母出现的次数

Dim zf As String, x As String, p As Integer

Dim maxa As Integer, maxb As Integer

{#blank#}1{#/blank#}

For i = 1 To Len(zf)

 x = Mid(zf, i, 1)

 If pd(x) = 1 Then

  p = Asc(x) - Asc(“0”) + 1

  a(p) = a(p) + 1

  {#blank#}2{#/blank#}

  p = Asc(x) - Asc(“A”) + 1

  b(p) = b(p) + 1

 Else

  p = Asc(x) - Asc(“a”) + 1

  b(p) = b(p) + 1

 End If

Next i

k = a(1):maxa = 1

For i = 2 To 10

 If a(i) > k Then k = a(i):maxa = i

Next i

k = b(1) :maxb = 1

For i = 2 To 26

 If{#blank#}3{#/blank#}Then k = b(i) :maxb = i

Next i

Label1.Caption =“出现最多的数字是” + Chr(maxa+ Asc(“0”)-1)

Label2.Caption = “出现最多的字母是” + Chr(maxb + Asc(“A”)-1)

End Sub

Function pd(ch As String) As Integer ’函数用于判断每个字符类型

 If ch >= “0” And ch <= “9” Then pd = 2

 If ch >= “A” And ch <= “Z” Then pd = 2

 If ch >= “a” And ch <= “z” Then pd = 3

End Function

参赛班级用数字1，2，3，4……number表示，依次存入数组a(1)～a(number)，若1号班级的编号为5，则a(1)=5。

a=[4，5，3， 6， 7，8，2， 9， 1]

m，c=1，1

for i in range(1， len(a))：

    if a[i]>=a[i-1]：

        c+=1

        m=max (m， c)

    else：

        c=1

print(c，m)

则程序执行后，c和m的值分别是(     )

def cal(n):

    if n <= 1:

        return 1

    if n % 2 == 0:

        return 2*cal(n-1)

执行语句k=cal(5)，则k的值为（   ）

s1="today"

s2=""

for c in s1:

    s2=c+s2

print(s2)