A Patient Is Advised to Lose 20 Pounds in Order $\frac { 1 } { 2 }$

A patient is advised to lose 20 pounds in order to reach a healthy weight. During the next month, the patient loses 1 $\frac { 1 } { 2 }$ pounds the first week, 2 $\frac { 3 } { 4 }$ pounds the second week, 3 pounds the third week, and 4 $\frac { 3 } { 4 }$ pounds the fourth week. How many more pounds does the patient need to lose in order to reach the goal of a 20-pound loss?

A) 8 pounds
B) 1 pounds
C) 2 pounds
D) 3 pounds
E) 4 pounds