1. In the following program, find all the identifiers which have block scope. (The identifiers may be in different scopes.)

double a, b; 

static int c; 

int d ( float e ) 

{ 

 int f, g; 

 double h; 

 for ( f=0; f<10; f++ ) 

 { 

 int i; 

 . . . 

 } 

} 

int j () 

{ 

 . . . 

} 

		a
		b
		c
		d
		e
		f
		g
		h
		i
		j

2. When used on function definitions or declarations of variables outside of any block, the keyword _________ changes the linkage from external to internal.