I need someone to help me the error in my android studio project remotely

i dear i am looking for a android developer to help me solve the error in my code remotely. below are some of the lines of error.

error: cannot find symbol
player = ExoPlayerFactory.newSimpleInstance(DetailActivity.this);
^
symbol: variable ExoPlayerFactory
location: class DetailActivity

error: cannot find symbol
TrackSelection.Factory videoTrackSelectionFactory = new AdaptiveTrackSelection.Factory(bandwidthMeter);
^
symbol: class Factory
location: interface TrackSelection

error: no suitable constructor found for Factory(BandwidthMeter)
TrackSelection.Factory videoTrackSelectionFactory = new AdaptiveTrackSelection.Factory(bandwidthMeter);
^
constructor Factory.Factory() is not applicable
(actual and formal argument lists differ in length)
constructor Factory.Factory(int,int,int,float) is not applicable
(actual and formal argument lists differ in length)
constructor Factory.Factory(int,int,int,float,float,Clock) is not applicable
(actual and formal argument lists differ in length)