1. One ISP (Internet Service Provider) has the following rate schedule for high speed internet service. Monthly Service Charge - ₱1500.00 the first 500GB of Usage is Free, the Next 500 GB of Usage will charge ₱35/GB. Over 1000 GB of Usage - ₱15.00/GB. Write a piecewise function to represent this situation. Be Careful. Remember if you use 501 GB, you will only be charged for one GB because the first 50 are free.

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