How old was Renoir when he painted 'The Umbrellas'?

He was either 38 or 39 when he started it and did his last work on it he was 44 or 45 According to wikipedia Pierre-Auguste Renoir was born in 1841. Two women with Umbrellas was painted in 1879, making him 38 years old and Umbrellas was painted in 1883 making him 42 years old.