For Vina,cigarettes Reduce Feelings of Tension and Anxiety

For Vina,cigarettes reduce feelings of tension and anxiety.Because of her heavy smoking,however,she has a bad morning cough and breathing difficulties.How can the principles of operant conditioning help to explain the development and continuation of Vina's self-defeating smoking habit? Explain the extent to which the reinforcement for Vina's habit is positive or negative,primary or conditioned,immediate or delayed,partial or continuous.