Our client is a builder who constructs office buildings and residential apartments on contract. There’s a new contract construction of a residential society. Almost 30% of the society has been built and now the builder is thinking of using a different type of brick as the base material compared to what he had been using earlier. He has the option of using one out of the followingbricks: Common Burnt clay bricks, Fly Ash bricks, Concrete bricks. We have to help him decide which one to select