Photo 1:

1.       Selected HSL/Grayscale icon

2.       Turned on the Convert to Grayscale checkbox

3.       Selected Split Toning icon

4.       Dragged the Highlights Hue Slider to 190 (grayish-blue)

5.       Increased Highlights Saturation to 50

6.       Dragged the Shadows Hue Slider to 30

7.       Dragged the Shadows Saturation Slider to 50

8.       Dragged the Balance Slider to -25

I like the sepia-tone effect in this photo after the split-toning settings were applied.