Count lines and list of value in my dataset

Hello, 

I have an object "ProjectProduct" with fields "Project" and "ProductLine" with data like this :  

Project; ProductLine 

Project 1; PL4 

Project 1 ; PL6 

Project 1; PL6 

Project 1; PL9 

Project 2; PL1 

Project 3; PL1 

Project 3; PL5 

As you can see, a same product line could be displayed several times for a project. 

In the recipe, I want to :  

1) deduplicate the productLines for same project. In this exemple, PL6 for Project 1 has to be displayed once. 

2) For each project, I want to know the number of productline by project  :  

Project | number of productline 

Project 1 | 3 

Project 2 | 1 

Project 3 | 2 

3) For each project, I want to have the list of ProductLine with delimeter ";" 

Project | List productlines 

Project 1 | "PL4;PL6;PL9" 

Project 2 | "PL1" 

Project 3 | "PL1;PL5" 

Then in my dataset I need these values : 

Project | List productlines | number productlines 

Project 1 | "PL4;PL6;PL9"| 3 

Project 2 | "PL1" | 1 

Project 3 | "PL1;PL5" | 2 

Thank in advance for your help