What: 1. Build a model to estimate Sales of a GroceryPlus store. 2. Prior research shows that advertising expenditure is a significant predictor of Bike Sales at BikeMart. Cindy believes that the relationship between advertising expenditure and sales is also influenced by the number of promotional campaigns. Test Cindy's assumption by modelling the interaction between the predictors and the target variable. 3. Build a model to predict which customers will buy headphones after purchasing a mobile phone at Gadget4U. 4. Cindy has already done the initial analysis for a model to predict the likelihood of a store manager resigning at CosmeticChain. She has narrowed down the key predictors to the manager's age, experience, and gender. 4.1. Develop a model to ascertain the likelihood of a store manager resigning. 4.2. Cindy is specifically interested in understanding the probability of a manager in mid-thirties with varying levels of managerial experience (i.e. 2- 16 years) and across both genders resigning. Accordingly, visualise the predicted probability of resigning with the values and attributes described earlier