Thread: free functions (or static members) to access private function from different class

Here's my scenario ...

I have two classes class A & B

Code:

// A.h

Class A
{
private:
       void nicefoo();
       void badfoo();
}

Code:

//B.H

Class B
{
public : 
    static void firstFreeFoo();
    static void secondFreeFoo();
}

void B::firstFreeFoo()
{
   A.niceFoo(); // I need to call nicefoo ?
}


void B::secondFreeFoo()
{
   A.badFoo(); // I need to call badfoo ?
}

How do i achieve this...?

my thoughts...
1. Perhaps i can declare an instance of A inside both static functions, but then both nice&bad foo are private
2. If i do declare two instance of foo, then i have too many class A instances, what if there are many static functions to use A? Isn't it a problem to have too many instances.
3. Should A be a singleton?