Given triangle PQR with angles PRQ = (8x - 10), RPQ = (4x - 14), and PQR = (7x - 5), find each measure.
a) PRQ = 30°, RPQ = 16°, PQR = 25°
b) PRQ = 40°, RPQ = 20°, PQR = 35°
c) PRQ = 45°, RPQ = 30°, PQR = 60°
d) PRQ = 35°, RPQ = 25°, PQR = 20°