Task 7: Risk evaluation 7 The ladder that the workers are expected to use puts them at signicantly greater risk of injury. A good visual way of demonstrating and understanding this is to draw a risk matrix like the one shown below. Likelihood * \\iery unlikely Likely \\lery likely {Risk rating 1] (Risk rating 2] (Risk rating 3] Major injury Medium {Risk rating 3) '3 First-aid injury Low % {Risk rating 2) m Minor injury Low {Risk rating 1] Assuming that you are teaching someone who has never seen this kind of risk matrix before (a) show how the matrix can be used to confirm that the risk level was not acceptable when the ladder was used for the banner hanging activity. Note: Show your calculations and support the calculations, where applicable, using information from the scenario. (b) show how the matrix can be used to confirm the risk level of the banner hanging activity is acceptable, if a different form of access equipment (such as mobile scaffolding) was to be used. Note: Show your calculations and support the calculations, where applicable, using information from the scenario. {4) {6)