Internet Service in the Local Market Is Supplied by Laura's

Internet service in the local market is supplied by Laura's Internet Service.Laura has two types of consumers.The first type of customers is local businesses,and their demand for internet service is The resulting marginal revenue function for business customers is The second type is residential customers,and residential demand is The resulting marginal revenue function for residential customers is Laura's marginal cost function is If Laura practices third-degree price discrimination,what are the profit maximizing prices she charges business and residential customers?