Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Morning all! Of course it is sunny on this Monday morning to cheerfully welcome us back to work.:)
This tweet contains emotions: 
joy, optimism