Find the Mistake #66 - Chromatic, 4 part harmony (Advanced)

Identify three mistakes in the following four part harmonic progression. Further identify each mistake by voice part, measure, and beat and identify it as a mistake in pitch or rhythm. To reveal the answer, click on "show more":

Measure 1, beat 2, Alto: Moves to Bb early.
Measure 3, beat 1, Bass: Incorrect pitch (C instead of E)
Measure 4, beat 3, Alto: Incorrect pitch (G instead of E)

[leonhrad]

The first mistake would be really hard to sing deliberately and without noticing it