1. A research group would like to investigate aroma compounds in palm sap juice. The first step of the study is to extract the juice with organic solvent. In this study, they plan to use 5 different organic solvents (dichloromethane (A), diethyl ether (B), ethyl acetate (C), pentane (D), and ethanol (E)) to extract the aroma compounds from palm sap juice. Each extraction needs at least 2L of palm sap juice. From these following situations, which type of experimental design is the most suitable for each situation. Construct the analysis of variance table (show only source of variation and degree of freedom) and explain how you arrange the samples for each design. In February 2022, the research group harvested a total of 65L (13L each province) of fresh palm sap juice from 5 provinces in the south of Thailand (Phetchaburi, Prachuap Khiri Khan, Chumphon, Ranong, and Surat thani). The whole extraction process took 8 hours. Therefore, to balance the workload, five people were assigned to extract the samples.