Convert the given simple sentence to a complex sentence.
We are going on the excursion to have a great time.
1
We are going for the excursion so that we will be able to have a great time.
2
We are going for the excursion in order to have a great time.
3
We will go for the excursion to have a great time.
4
We are going on the excursion so that we can have a great time.