123

![plot4](https://cloud.githubusercontent.com/assets/7949443/3540963/0a05dd3c-0848-11e4-9639-51e4fd42f09e.png)
![plot1](https://cloud.githubusercontent.com/assets/7949443/3540964/0a07bc88-0848-11e4-95fd-a27f64ad5460.png)
![plot2](https://cloud.githubusercontent.com/assets/7949443/3540965/0a099076-0848-11e4-969c-89b177e69f91.png)
![plot3](https://cloud.githubusercontent.com/assets/7949443/3540966/0a0b9330-0848-11e4-921d-2b84b86b7afd.png)