Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture the tweeter's mental state.
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