[Python] Pyspark - Convert yearWeek and Day into date

I have two columns in pyspark dataframe in Databricks:

1. YearWeek (2417)
2. Day (0,1,2,3,4,5) - day of a week

Need to create a column with a date. I was trying to do that in sql(date_add…) and also strptime in Python. SQL returns wrong data and strptime does not work with withColumn

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