Which one of the following is a way to improve the P/Q rating of a company's action-capture cameras?

1. Spending additional money to improve the camera mounting device

2. Further reducing the size and weight of the company's camera models

3. Increasing the warranty period from 90 days to 120 days

4. Improving the caliber of the built-in GPS/Wi-Fi/Bluetooth components

5. Increasing the number of photo modes for videos and still photos from 4 to 7