The pressure test

Mara worked methodically, checking each seal in the same order although the workshop had begun to empty. When the gauge slipped back for a third time, she did not blame the equipment or hurry the next attempt. She steadied the coupling, wrote down the reading and began again. Only when she removed her gloves did I notice the red marks across her palms. “We can find it,” she said, returning to the first connection.

From the passage, select one word or phrase that describes Mara's controlled manner and a different word or phrase that presents her as determined despite difficulty. Explain how your second selection creates this impression.