5. Revise the following paragraphs, using the skills you learned in this section to make the writing economical and easier to comprehend.

a. There are more than 2,600 automatic external defibrillators being recalled by Good Heart Inc. It has been learned that the United States Food and Drug Administration (FDA) has received reports of electrical problems of the machine in the electrode pads for placement on the chest. Although very rare, this problem could make the use of the device dangerous.

b. Defibrillators are used by emergency responders, amateur and professional, to treat sudden, unexpected, and unforeseen cardiac arrest. Good Heart Inc. representatives said every effort will be made to locate customers and replace defective units. Purchasers may refer back to their invoices; if the model number is BC 4039–BC 5011, in many cases, these machines are included in the recall. These units were manufactured from January in the year of 2010 through August in the year of 2011.

c. While the recall is voluntary, the FDA is considering further investigation and a mandatory recall at a later date. It is not known how many people have been adversely affected by malfunctions of automatic external defibrillators from Good Heart Inc.`