At a crime scene fibers were found on a victim's body. The fibers microscopically match with articles of clothes owned by two different suspects. You decide you have enough sample to try to compare the dyes using TLC. The extraction process is unsuccessful after 10 min of 4:3 pyridine/water but successful after 20 min of 2% oxalic acid. a. What type of dye class have you most likely extracted? b. What would be an appropriate TLC eluent for this extraction?