Bible Study Seattle

Jacob was born to Isaac and Rebekeh in 1960BC.  Abraham died fifteen years later in 1945BC.  Joseph was born 1870BC.  Jacob leaves Laban in 1863BC after 20 years of service to him.  Jacob then runs into Esau before Joseph is sold to the Egyptians in 1852BC.  Isaac dies aged 180 years in 1840BC.    Joseph ascends the throne in 1838BC.  Jacob dies age 147 in 1813BC.  Where was Isaac during the betrayal of Joseph?  Did Jacob confer with Isaac over the apparent loss of his favorite son?  Did the brothers get a talking to by their grandfather Isaac?