How to apply nested group by in DAX power bi - powerbi

Question

I have a survey data in a DWH and I want to calculate satisfaction rate,
I was able to do so with SQL server query, but due to lack of knowledge in DAX I couldn't achieve it as a measure in power BI using DAX.
The data warehouse contains 3 tables plus the DIM_DAT, bellow is a sample of the data:
Data model:
The formula to calculate the satisfaction:
(Count of RESPONDENT where ANSWER_VALUE >= 4 for each question (group by QUESTION_DESC).
divided by the number of answers for each question)
grouped by QUESTION_PRIMARY_STAGE and multiply by the weight (the weight is different for each QUESTION_PRIMARY_STAGE)
I was able to achieve the desired result by SQL server query, but because it's only the final result (satisfaction I can't do further analytics on it for example : satisfaction by department / Question / Stage).
.
My SQL server query:
SELECT SURVEY_NAME, SUM(FINALPERC) as SATISFACTION -- sum the satisfaction of the Stages
FROM
(
SELECT SURVEY_NAME, QUESTION_PRIMARY_STAGE,
(AVG("4-5 %") * WEIGHT)/100 AS FINALPERC -- multiply by the weight of each QUESTION_PRIMARY_STAGE and divid it by 100 (the sum of the weight for the stages are 100)
FROM (
select tmp0.SURVEY_NAME, tmp0.QUESTION_DESC, tmp0.QUESTION_PRIMARY_STAGE, tmp0.WEIGHT ,
("4-5"*1.0 / tmp1.COUNTR) as "4-5 %" -- divide by the number of answers for each question
from(
select da.SURVEY_NAME, QUESTION_DESC, da.QUESTION_PRIMARY_STAGE, da.WEIGHT ,
count(fr.RESPONDENT_SRGT) as "4-5" -- Count of RESPONDENT where ANSWER_VALUE >= 4 for each question (group by QUESTION_DESC)
from [dbo].[DWH_QLT_FACT_SURVEY_RESPONSES] fr
join [dbo].[DWH_QLT_DIM_QUESTION_ANSWER] da
on fr.QUESTION_ANSWER_SRGT = da.QUESTION_ANSWER_SRGT
and da.ANSWER_VALUE >= 4
group by da.SURVEY_NAME, QUESTION_DESC, QUESTION_PRIMARY_STAGE, WEIGHT
) tmp0
join
(
--------------------------------Get the number of answers for each question----------------------
select da.SURVEY_NAME, QUESTION_DESC, COUNT(RESPONDENT_SRGT) COUNTR
from [dbo].[DWH_QLT_FACT_SURVEY_RESPONSES] fr
join [dbo].[DWH_QLT_DIM_QUESTION_ANSWER] da
on fr.QUESTION_ANSWER_SRGT = da.QUESTION_ANSWER_SRGT
group by da.SURVEY_NAME, QUESTION_DESC
)tmp1
on tmp0.QUESTION_DESC = tmp1.QUESTION_DESC
-------------------------------------------------------------------------------------------------
)TMP2
GROUP BY SURVEY_NAME, QUESTION_PRIMARY_STAGE,WEIGHT
)TMP2
GROUP BY SURVEY_NAME
Problem:
I want to convert this formula in DAX.
Original masked data are in the shared excel sheet bellow:
https://1drv.ms/x/s!Aq0hOy_0CV0IhD04ClHKc9F-DP2H?e=s5dhjG