Probably four, but I could be wrong.
1/4 tsp
Start with about 1/4 of that and adjust to taste. Dry herbs are much stronger than fresh ones, but it can be hard to give exact amounts as substitutes. Best to use less and adjust than to use too...
1 and 1/3 teaspoon
1 tsp dried= 1 tbsp fresh
Not over 1 tsp. Ground is much stronger. Taste as you go.