Rewrite the following program to assign the starting and ending values of the DO loop to macro variables. Print the results.

data func1;

do n = -3 to 3;

f1 = 1/2/sqrt(constant('pi'))*exp(-(n**2)/2);

output;

end;

run;

title "normal density function values form -3 to 3";

proc print data = func1 noobs;

run;