Answer:
Type of sentence: Command Statement/Command
Symbol: !
Step-by-step explanation:
I'll try my best since I'm in mid school, but the sentence is an explamation mark (!) because your mom in this sentence is telling you to clean your room AND to walk your dog, this can't be a question because it doesn't include how, where, why, when, this can't be an excitement because it has a negative connotation, it could be a statement but it's not stating what you would do it's more of like a command because your mom is commanding you by simply telling you to clean your room and walk the dog.