foods for pesach

Question

1. is westbrae natural stoneground mustard (ing. water, grain vinegar, organic mustard seed, salt & spices) ok for pesach? 1a. or any other organic mustard? 2. is eden agar flakes ok for pesach? 3. is eden organic apple juice ok for pesach? 4. what about knudsen organic apple juice? (juice from ripe, hole oranic applies and ascorbic acid) 5. is martinelli's organic apple juice ok? 6. kyushu organic brown rice vinegar (water, organic whole brown rice)? thank you and chag pesach sameach!