This is a philosophy question. Can you show me the answer with solution? Thank you.

For each of the arguments in 20-26, determine whether or not the argument is valid. 20. 1. If dogs are mammals, then all dogs are reptiles. 2. Dogs are mammals .3. All dogs are reptiles. All cacti are succulents. Not all succulents are cacti. Some cacti are succulents. 21. 1. 2. .. 3. 1. 2. 3. All cats are mortal. Socrates is mortal. Socrates is a cat. 22. .'. 23. 1. Murder is always wrong. . 2. The death penalty should be illegal. 24. . Murder is always wrong. 2. Sometimes murder is not wrong .3. The death penalty should be illegal