Who participated in ‘Satyagraha’ started by Gandhiji at Ahmedabad in 1917-18?

Who was first selected by Gandhiji for Individual Satyagraha?

At which place of Bihar, Gandhiji started Satyagraha movement for the first time in India :

In which of the following Satyagraha movements, did Gandhiji not participate directly?

Who led the Champaran Satyagraha in 1917 ?

Who saved the life of Gandhiji in Bihar during Champaran Satyagraha?