Summarize the points made in lecture, being sure to explain how they cast doubt on specific points made in the rading passage

The reading and the lecture are both about Sketch of Jane Austen full-length portrait (who was one of the most well-known English-novelist) painted by her sister Cassandra. Whereas the author of the reading states that Austen's family claims that the girl in the portrait is teenage Jane. In fact, the lecturer finds a good amount of reason to reject the points in the passage. First of all, according to the reading, Austen's family recognized that the teenage girl in the portrait is Jane Austen.And after  Austen's death in 1882 Austen's family gave them allowance to use portrait .However, the lecturer disputes this point. He says that when portrait was recognized as Jane Austen in 1882, Jane Austen has been dead for almost 70 years. Furthermore,he mentions that the family who recognized the portrait as Jane Austen had never seen her in real life. So they can't tell for sure that portrait was actually Jane Austen Secondly, the reading states that in portrait you can see an adult version of Jane Austin, in fact,the face features are similar to those of the teenage girl. Nevertheless, the lecturer refutes this argument. She Argues that Austen's family had a lot of relatives-cousin who was the same age as Jane Austen, so for this reason,many experts believe that the girl in the portrait can be her relative whose name was Marianne Campion who was a distant niece of Austen's. Finally, the reading claims that despite the fact that the painting is unsigned and undated, there are witnesses that it was painted when Jane Austen was a teenager. The style matches with a well-known artist called Ozias Humphrey- a professional society portrait painter and Austen's family could have hired her to paint this portrait. On the other handle ,lecturer believes that the only reason they claim Ozias Humphrey as a Jane Austen's portrait painter is the style matching.He thinks that the stamp on the back of the picture indicates that the blank canvas actual piece of cloth whose the picture was painted was sold by a man named William Legg.Moreover,he considers that William Leg didn't sell canvases in London when Jane was a teenager. In conclusion, although the reading and the lecture are both about Jane Austen portrait made by her sister Casandra, the three main points made in the reading are effectively challenged by the lecturer.