Show the calculations Herfindahl Index and 4 firm concentration ratio.Delta $29.9 billion American $29.9 billion United $24.6 billion Southwest $15.8 billion Alaska $6.2 billion JetBlue $6 billion Spirit $3.2 billion Frontier $2.1 billion Allegiant $1.7 billion.Based on recently proposed merger guidelines accompanied by other strategic aspects that you want to consider, examine if the Spirit and Frontier Airlines merger be allowed