Electric Potential due to a Ring of Charge

What is the electric potential (with respect to infinity) for a ring of charge with radius R and total charge q. I will find the potential at a point along the axis of the ring a distance "a" from the center.
Bonus - there are two ways to find this potential.

[@yancaquino-gutierrez9907]

You are not a loser, thanks for helping me with physics, hope I can be as good as you someday

[@MuffinKingStudios]

Not the most perfect explanation but you certainly taught us its okay to make mistakes! Still struggling with these integrals in Physics E&M, but you show with a little intuition that its actually pretty simple. Thank you.

[@mokoepa]

Loved the video. Subscribed.

[@siddhantsawant272]

Thanks!

[@mokoepa]

Definition of perfection

[@AkshataGarg]

Thanku

[@shreya2864]

Oh man the sign change has really confused me !? Can you explain to me why it went wrong?

[@justinofearth]

your sign mistake would be because deltaV=V(infinity)-V(r=a) and you are choosing V(infinity)--->0. solving for V(r=a) would then net you your positive answer