They're not. Patricia is the wife of Otis, who runs (or ran) Hershel's farm. She acts as Hershel's assistant
Hershel Greene is played by Scott Wilson.
Hershel Greene's farm is located between the GA Hwy 85 and Chestlehurst Road in Senoia, Georgia.
Hershel's hired man, It is, accidentally shoots Carl while shooting at a deer.
She stumbles out of Hershel's barn, a walker, in season two, episode 7, Pretty Much Dead Already.
Yes, she is the last walker to leave Hershel's barn. In episode seven.
Hershel Greene is played by Scott Wilson.
Hershel Greene's farm is located between the GA Hwy 85 and Chestlehurst Road in Senoia, Georgia.
Hershel's hired man, It is, accidentally shoots Carl while shooting at a deer.
She stumbles out of Hershel's barn, a walker, in season two, episode 7, Pretty Much Dead Already.
Patricia, Herschel's wife.
No. By the time they found her, she was already a zombie in Hershel's barn.
Yes, she is the last walker to leave Hershel's barn. In episode seven.
In 'The Walking Dead' Comics Hershel dies after being shot by the Governor, he loses 5 out of the 6 Children he has in the comics and decides he can no longer go on, he is approached by the Governor at the prison and requests that he just shoots him anyway.
Which old man? The one who owns the farm is Hershel and the one that is part of Ricks group is named Dale.
Actress Emily Kinney plays Beth Greene. Beth is the younger daughter of Hershel, and the half sister of Maggie.
"Triggerfinger" This is the episode that Shane opens the walker barn on Hershel's farm. Hershel and Rick are returning from the creek with two more walkers to put into the barn when Shane snaps and shoots the female that Hershel has tethered. This is also the apex episode in which we learn that Sophia is dead and has reanimated, and the assumption that Otis put her there before he was killed.
Sasha did not die in The Walking Dead, yet. Although she contracted the flu infection while in the prison, and became really sick, like many others, Sasha was treated and eventually recovered -- somewhat, by Hershel. We will see Sasha in Season 5.