How is Mrs Birling presented in 'An Inspector Calls'?

Throughout the play, Mrs Birling is presented by Priestley as a character with few redeeming personality traits. She is firstly described as 'a rather cold woman' in the opening text. Priestley continued to develop her into a snobbish, intractable character. This personality is expressed through her attitude and dialogue towards the other characters, particularly the Inspector.
When Mrs Birling is being questioned by the Inspector, her evasive and arrogant tone seems designed to anger the audience. She repeatedly tries to evade the Inspector's questions by answering with questions of her own, such as 'what business is it of yours?' Her rhetorical put-downs highlight her evasiveness as she tries to obstruct the inevitable emergence of the truth. It is clear to the audience that the Inspector already knows the truth after forcing confessions from past questioning, which serves to reinforce the frustrating nature of Mrs Birling's evasive answers. The Inspector also becomes noticeably irritated, whereas his usual demeanour is calm and composed. Mrs Birling's refusal to answer his questions honestly demonstrates her stubbornness. It also suggests a lack of morality in not taking responsibility for her actions.