Hi guys, I need advice regarding this question:

The height of students at university is a random variable from the N($\displaystyle \mu$,25) distribution.

A sample of 100 students was taken, and it was found that k of them have a height below 175 cm.

a. based on this information, find a maximum likelihood estimator for $\displaystyle \mu$ .

b. calculate the MLE when k=33.

I have no idea how to approach this, anyone got an idea ?

thanks