How to make the tastiest lemonade?!

During one of the labs on the course in chemometrics, students are asked to find the optimal concentration of lemon and sugar to make the tastiest lemonade. And the students will use themselves as samplers!

Given a number of samples with different concentrations, each student is asked to give their opinon on each sample, plot them into R and then model the data in order to find the "sweet spot" where most people would enjoy it the most.

Who said analytical chemistry had to be done in lab in a white coat?