Answer:
When you use desu"ne" you are saying something that( you think) someone you talk with agrees with what you say.
ex.)いい おてんき ですね。 (He is awake and knows it's fine.)
When you use desu"yo" you are giving new information to someone you talk to.
ex.) いい おてんき ですよ。（He’s still in bed and doesn't know today's weather.)
Explanation:
