Iam struggling with this question, i find this topic hard to understand

here is the question

Let X and Y be two independent random variables with identical

probability density function given by

**f(x)= (3*(x^2))/θ if 0<x<θ**

for some θ>0.

*What is the probability density function of W = min{X, Y }?*

Please provide me with answered steps and explanation, so i can understand this topic

I will really appreciate your help

Thanks in advance