The following table shows the number of different types of smartphones sold by a retailer:
| Type of Smartphone: | Android | iOS | Windows | Others |
| Number: | 1200 | 800 | 400 | 300 |
If a pie chart is constructed for the above data, what will be the angle of the sector representing iOS smartphones?
1
144°
2
106.5°
3
90°
4
72°