Consider the following statements related to the uses of computer programs in the structural analysis:

1. To analyze a truss with rigid joints would be a lengthy computation by the classical methods of analysis

2. The rigid joints (in truss analysis) are assumed to be pinned joints by the designers to simplify the problem.

3. The computer programs enable to consider the real situation (rigid joints) and also give the accurate results in a quick time.

Which of the above statements are correct?