Yes because they do many works and they posses the qualities of a gentle man. Though they earn enough they don\’t spend for their clothes or their needs but are worried about their sister.

YES . They were extremely hurt and pained to know that thier sister Lucia is suffering from tuberculosis of spine. They took her to the hospital and persuaded the authorities to take her in. They could do anything to earn more money for her treatment. Whatever they did, they did it willingly without any grumbling or complaining. They sacrificed everything for their beloved sister Lucia.
Yes there can be no doubt
Yes bcause no one was forcing them to do so…