Better to write like this

[eatam23]

Location Please provide:

1. Version (bottom left page): 2022 July version
2. Page number : 256
3. Line/equation number: +4 from top

Describe the mistake Please let us know what is wrong: $\big{yi\big}{i=1}^{n_u}$ should be $\big{yi\big}{i=n_l+1}^{n}$

Suggested change $\big{yi\big}{i=1}^{n_u}$ should be $\big{yi\big}{i=n_l+1}^{n}$

Additional comments