Which of the following statements is true or false regarding the CPR technique?1. Czan be given irrespective of rib fracture.2. An adult chest compression : breath is 30 : 2 to 15 : 2 even if 2nd rescuer present.3. In infants ratio change from 30 : 2 to 15 : 2 when 2nd rescuer arrive.4. Chest compression at rate of 100 - 120 / min on adults and 90 per minute in infants.