Creating new table with Calculated Columns

In response to VahidDM, here's my question with more details in text format. Thank you!

I have a table below:

Table A

Project Name   Type         Identifier        Finish Date
Project A           Large          RK-1            2022-01-01
Project A           Large          RK-2            2022-01-31
Project A           Large          RK-3            2022-03-15
Project A           Large          RK-4            2022-03-28
Project B           Med            RK-5            2020-08-01
Project B           Med            RK-2            2020-09-01
Project B           Med            RK-6            2020-12-31
Project B           Med            RK-4            2021-01-15
Project C           Small          RK-2            2021-08-06
Project C           Small          RK-3            2021-09-07
Project C           Small          RK-7            2021-10-11

I would like to create a new table that will look like this:

Table B

Project Name          Type         Deliverable        Duration
Project A                  Large              XX               datediff(finish date of RK-1 and finish date of RK-2
Project A                  Large              YY               datediff(finish date of RK-3 and finish date of RK-4
Project B                  Med                XX               datediff(finish date of RK-5 and finish date of RK-2

Project B                  Med                YY               datediff(finish date of RK-6 and finish date of RK-4
Project C                 Small                XX              datediff(finish date of RK-2 and finish date of RK-3
Project C                 Small                YY              datediff(finish date of RK-3 and finish date of RK-8

I have created separate DAX tables for each deliverable and combined all those dax tables together. But is there a way where I can combine all of these in one table at once without creating multiple tables?

Thank you in advanced for your help.