ii. R = 2 Ω, X = 8 Ω 2 20 iii. R = 4 Ω, X = 8 Ω 2 20 iv. R = 8 Ω, X = 8 Ω 2 20 Firstly, we calculate T , T , S at which T occurs. s m m i. ii. iii. iv.