what is Utitlity curve and what is MRR AND capital could explain all of them in the same curve?

Answer 1

It's a term referring to the total satisfaction received from consuming a good or service. You are attempting to measure utility indirectly with consumer behavior theory.

Utility is a concept that was introduced by Daniel Bernoulli, which assumes that consumers will strive to maximize their utility

Answer 2

I assume the utility cure you are after has risk on the x-axis and ruturn on the y-axis. The curve itself is convex as initially both risk and return increase rapidly. MRR = marginal rate of return refers to the increase in return for increased risk. This levels off as you move along the x-axis.