1. A truck is carrying Natural Gas Liquids (Ethane, Propane, Butane & Pentane) at 10 bar storage pressure. The components molar fractions are: 0.5, 0.2, 0.2 and 0.1 respectively. The upper and lower flammability limits are respectively: Lower Component Limit Upper Flammability Flammability Limit Ethane 3 12.4 Propane 2.1 9.5 Butane 1.8 8.4 Pentane 1.4 7.8 A. What is the main safety risk associated with the load? B. Define what are the upper and lower flammability limits. C. What is the mixture upper and lower flammability limits? D. Dry air contains 21% oxygen and 79% Nitrogen. Calculate what is lowest % of air which can ignite the NGL mixture