Please help me with the ones I got wrong. I can't figure it out. And need explanation.

A cash budget, by quarters, is given below for a retail company (000 omitted). The company requires a minimum cash balance of at least $5,000 to start each quarter. Fill in the missing amounts. (Enter your answers in thousands of dollars. Cash deficiencies and Repayments should be indicated by a minus sign.) Answer is complete but not entirely correct