True about boundary of triangle of auscultation is ?

Triangle of auscultationIt is a small triangular space on the back, near inferior angle of scapula, where the relatively thin musculature allows for respiratory sounds to be heard more clearly with a stethoscope. The sounds of swallowed fluids can be sometimes heard in esophageal obstruction as cardiac orifice of stomach lies deep to this triangle. It is formed byMedially : Lateral border of trapeziusLaterally : Medial border of scapulaInferiorly : Upper border of latissimus dorsiFloor is formed by : 6th and 7th rib with intercostal space between them, rhomboideus major.Apex of lower lobe of both lungs lie beneath this triangle.