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A Database Engineer is tasked with sizing a Cloud Spanner instance to accommodate the current environment workload metrics and future requirements for an e-commerce company. The current average workload metrics are as follows: 8,000 reads per second during peak times 4,000 writes per second during peak times 4 TB of data storage 99.99% availability requirement The company expects a 100% increase in reads and writes per second and a 30% increase in data storage over the next year. Which of the following instance configurations is the most appropriate to handle the anticipated growth while optimizing costs?