Найдите произведение положительных двузначных чисел по информатике. циклическим алгоритмом

Unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls;

type
  TForm1 = class(TForm)
    Image1: TImage;
    Button1: TButton;
    OpenDialog1: TOpenDialog;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
 if OpenDialog1.Execute then
 begin
  Image1.Picture.LoadFromFile(OpenDialog1.FileName);
  Image1.Stretch:=true;
  Image1.Left:=form1.Width div 2-image1.Width div 2;
  Image1.top:=form1.Height div 2-image1.Height div 2;
 end
end;

end.

1)
var a:array [1..10] of integer;
      i,sum:integer;
begin
  randomize;
  sum:=0;
  for i:=1 to 10 do
    begin
      a[i]:=random(100)-50;
      write (a[i],' ');
      if a[i] < 0 then sum:=sum+a[i];  
    end;
  writeln;
  writeln ('Summa: ',sum);
  readln;
end.

2)
var a:array [1..10] of integer;
      i,max,index:integer;
begin
  for i:=1 to 10 do
    begin
       write ('A[',i,'] = ');
       readln (a[i]);
    end;
  max:=a[1];
  index:=1;
  for i:=2 to 10 do
    if a[i] > max then
      begin
        max:=a[i];
        index:=i;
      end;
  writeln ('Max: ',max,'.Index: ',index);
  readln;
end.

3)
var a:array [1..10] of integer;
      max,min,i,temp:integer;
begin
  randomize;
  for i:=1 to 10 do
    begin
       a[i]:=random(50);
       write (a[i],' ');
    end;
  writeln;
  max:=1;
  min:=1;
  for i:=2 to 10 do
    if a[i] > a[max] then max:=i else
      if a[i] < min then min:=i;
  writeln ('Max: ',a[max]);
  writeln ('Min: ',a[min]);
  temp:=a[min];
  a[min]:=a[max];
  a[max]:=temp;
  for i:=1 to 10 do write (a[i],' ');
end.