For the following logical argument, either provide a formal proof (using inference rules or logical equivalence laws) showing the argument is valid, or an assignment of truth values that shows the argument is invalid.

1) j g

2. g l

3. k (h i)

4. (h l) i

5. (i k) (g h)

k

If you stated the argument is invalid, provide an invalidating truth assignment here:

g= , h= , i= , j= , k= , l=