DirectX11 Modification to existing Source Code

I have an existing simple DirectX source code that has Ambient, diffused and specular lighting on it. I need to make amendments to it (5 basic tasks). 1) Adding simple point light 2) Duplicating point light and giving it a different color 3) Implement attenuation onto a point light. 4) Allow the application to handle both directional lighting and point light together 5) Implement spotlight I will provide source code, brief, and information you may need (such as attenuation). It is for my learning purpose (which I'm unclear about), so please do add comments for any adjustments you make in the source to justify it and for me to do a comparison with my existing source to see where I went wrong. Would appreciate if it can be done in a day. It should be programming in VS2015 if possible.