Help me please, thank you with explanation.

5. A car parking garage costs P50 per day for the first 5 days. After that, the cost decreases to P30 per day. a. Write a piecewise function for the cost of parking car for x days. b. What is the cost to park for 8 days?4. A construction worker earns P100 per hour for the first 40 hour of work and an additional P30 per hour of work in excess of 40 hour. a. Write a piecewise function that represents the amount a construction worker earns. b. How much will be the take home pay of the construction worker if he work for 45 hours