A construction company has been tasked with designing a new steel-framed building in a busy urban area of Australia. The building will be used as a retail space with offices on the upper levels. The company wants to create a design that maximises the available floor space while also being visually appealing and cost-effective. The project team must identify and evaluate design options to ensure the success of the project. Briefly explain the following techniques which can be used to identify and evaluate design options: Brainstorming sessions Conceptual sketches 3D modelling software Material selection Cost analysis