Первое и второе:
var
i, p, imin: integer;
a: array[1..16] of integer;
begin
p := 1;
writeln('Массив: ');
for i := 1 to 15 do begin
a[i] := random(11) - 5;
if a[i] < 0 then p := p * a[i];
write(a[i], ' ');
end;
writeln;
writeln('Произведение: ', p);
imin := 1;
for i := 2 to 15 do
if a[imin] > a[i] then imin := i;
for i := 15 downto imin do
a[i + 1] := a[i];
a[imin] := 10;
writeln('Массив: ');
for i := 1 to 16 do write(a[i], ' ');
end.
Третье:
var
i: integer;
a: array[1..12] of integer;
begin
writeln('Массив: ');
for i := 1 to 12 do begin
a[i] := random(21) - 3;
write(a[i], ' ');
end;
writeln;
for i := 1 to 6 do a[i] := a[i * 2 - 1];
writeln('Массив: ');
for i := 1 to 6 do write(a[i], ' ');
end.