kindly help

Are the following questions parameter optimization or Structure optimization? (1) Select the appropriate reflux ratio in the design of the distillation column to ensure less heat consumption and number of trays. (2) Determine the size of the reactor. (3) Determine the number of plates, column diameter, etc. of the rectification column. (4) Determine how to match hot and cold streams to make the most of internal system heat and reduce utility consumption. (5) In actual production, the temperature and pressure of the reactor are continuously adjusted to ensure the maximum conversion rate of raw materials