Triangles

State which of the following pairs of triangles are congruent. If yes,
write them in symbolic form (you may draw a rough figure).
(a) ∆ PQR : PQ = 3.5 cm, QR = 4.0 cm, ∠ Q = 60°
∆ STU : ST = 3.5 cm, TU = 4 cm, ∠ T = 60°
(b) ∆ABC : AB = 4.8 cm, ∠ A = 90°, AC = 6.8 cm
∆XYZ : YZ = 6.8 cm, ∠ X = 90° , ZX = 4.8 cm