An analyst predicts three economic states of a boom, average and bust economics states, with probabilities of 40%, 50% and 10% respectively. If a boom economic state occurs, stock A will provide a 10% return and stock b will provide 2% return; if an average economy occurs, stock a will provide a 6% return and stock b will provide a 5% return. During a bust economy, stock A will provide a -5% return and stock B at 12% return. Given this information, determine which stock is riskier