Below is an instruction that describes a task. Write a response that appropriately completes the request in Thai. Please answer in Thai.

### Instruction:
Cara is at her family reunion, where she discovers that she is 20 years younger than her mom.  Her mom is 15 years younger than Cara's Grandmother. If Cara's grandmother is 75, how old is Cara?

### Response:
 แม่ของคาร่า: 75-15=<<75-15=60>>60 ปี
คาร่า: 60-20=<<60-20=40>>40 ปี