7. The president of a bank evaluates branch managers in three attributes: management skills, leadership ability and procedures knowledge. Let X be the score of an employee out of 100. Let W be the weight of each attribute. The table below shows the data for this employee. Attribute X W management skills 72 7 leadership ability 74 3 procedures knowledge 63 4 Find the weighted mean score of this employee. A 69.9 B 64.6 C 77.1 D 80.4 E 73.1