Which of the following will lead to a compile-time error? Mark all that apply.

1
if (a > b) ( c = 0; )

2
if (a > b) { c = 0; }

3
if (a > b) c = 0 else b = 0;

4
if (a > b) c = 0;

5
if (a > b) then c = 0;

6
if a > b { c = 0; }

7
if a > b, then c = 0