In the microwave spectrum of \( ^{14}NH_3 \), lines are observed at the following frequency values in cm\(^{-1}\): 19.95, 39.91, 59.86, ... . In the microwave spectrum of \( ^{14}ND_3 \), the following lines are observed: 10.32, 20.63, 30.95, ... . Calculate the bond distance \( N–H \) and the bond angle \( H–N–H \).