Guess what song this is: My mind remains my pain
I'm tied down to this chain
It spirals as I ache
To find holy embrace
Stay with me, I'm afraid of my soul
Blackened and left in control
Cannot be free and you can't deny
The end is coming, the end is coming

[Chorus]
Will we live?
Will we die?
Just keep on saving our goodbyes
The fear and the cost
The world will stain us with a scarlet cross

Scarlet cross by Black Veiled Brides?

Omg, I've answered almost all of these, you must be tired of my by now XD

i think the answer could be either a or b because both are part of the post production part. hopefully this you a little.

coordinates of r(b,c)

slope of nm is 0.

step-by-step explanation:

the midpoint of the line joining the points (x₁,y₁) and (x₂,y₂) is given by

the midpoint of the line segment nk is given by

∴r(b,c)

the slope of the line joining the points (x₁,y₁) and (x₂,y₂) is given by

slope of rs is

hence

coordinates of r(b,c)

and slope of nm is 0.