Народ нужна по задачам связанным с Паскалем. Напишите код для 4,5,6,7 хотябы одному из этих задач.

Первая

Program n1;
Uses CRT;
Var a,b,c,k: integer;
begin
Writeln('Vvedite a,b,c');
Readln(a,b,c);
If (a=b)and(b=c) then begin k:=1; writeln('Ravnostoronnij') end else
If (a=b)or(b=c)or(a=c) then begin k:=1; writeln('Ravnobedrennij'); end;
If (sqr(a)=sqr(b)+sqr(c))or(sqr(b)=sqr(a)+sqr(c))or(sqr(c)=sqr(b)+sqr(a))
then begin k:=1; writeln('Pryamoygolnij'); end;
If (a>b+c)or(b>a+c)or(c>a+b) then begin k:=1; writeln('treygolnik nelza sostavit'); end;
If k=0 then writeln('Treygolnik Raznostoronnij');
readln
end.

Вторая 

Program n1;
Uses CRT;
Var a,b,c: integer;
begin
ClrScr;
Writeln('Vvedite a,b,c');
Readln(a,b,c);
If (a>0)and(b>0)and(c>0) then writeln('Summa kvadratov=',sqr(a)+sqr(b)+sqr(b));
If (a mod 2=0)or(b mod 2=0)or(c mod 2=0) then writeln('Summa =',a+b+c,', Proizvedenie =',a*b*c);
readln
end.

Program n1;
Uses CRT;
Const n=15;
Var A: array[1..n] of integer; B: array[1..n] of integer;
i,k,max: integer;
begin
randomize;
clrscr;
Writeln('ishodny massiv');
For i:=1 to n do
begin
a[i]:=random(100);
a[i]:=a[i]-50;
write(a[i]:4);
end;
writeln;
writeln('polychenny massiv');
max:=0;
For i:=1 to n do
begin
b[i]:=-a[i];
write(b[i]:4);
If a[i]=b[i] then k:=k+1;
If (b[i]>0)and(b[i]>max) then max:=b[i];
If (b[i]<0)and(-b[i]>max) then max:=-b[i];
end;
writeln;
Writeln('Kolychestvo neizmenyvshihsa elementov=',k,', samyi bolshoy po modyly element raven =',max);
writeln
end.