Plant Growth Calculation

During a school science project, four students—Ryan, Sarah, Alex, and Emma—are collecting data on the heights of different plants over time. Ryan measures his plant's height every week for 4 weeks, and he recorded the following heights in centimeters: 12, 15, 19, and 25. Sarah's plant grows at a steady rate of 4 cm per week, starting from an initial height of 10 cm. Alex has a plant that grows at a varying rate, starting at 5 cm with the following heights for the first 4 weeks: 5, 10, 15, and 22. Emma's plant follows the growth pattern of Ryan's but grows an extra 2 cm each week, starting at 10 cm.
What was Emma's plant height after 4 weeks of growth?