*** HOW MANY OBSERVATIONS WILL THERE BE IN THE FOLLOWING SAS DATA SETS;
*** WHAT ARE THE VALUES OF X AND Y IN THE DATA SETS;

data one;
input x y;
datalines;
1 2 3 4 5 6
;
run;

data two;
input x y @;
if x gt 1;
datalines;
1 2 3 4 5 6
;
run;

data three;
input x y @@;
if x gt 5;
datalines;
1 2 3 4 5 6
;
run;

data four;
input x y;
if x gt 5;
datalines;
1 2 3 4 5 6
7 8 9 10
;
run;

data five;
input x y @;
if x gt 5;
datalines;
1 2 3 4 5 6
7 8 9 10
;
run;

data six;
input x y @@;
if x gt 5;
datalines;
1 2 3 4 5 6
7 8 9 10
;
run;

data seven;
input x y;
if x gt 5;
datalines;
1 2 3
4
5 6
7 8 9
10
;
run;

data eight;
input x y @;
if x gt 5;
datalines;
1 2 3
4
5 6
7 8 9
10
;
run;

data nine;
input x y @@;
if x gt 5;
datalines;
1 2 3
4
5 6
7 8 9
10
;
run;