If ∑n=1∞an=5\sum_{n=1}^{\infty} a_n = 5∑n=1∞an=5 and ∑n=1∞bn=3\sum_{n=1}^{\infty} b_n = 3∑n=1∞bn=3, what is ∑n=1∞(2an−bn)\sum_{n=1}^{\infty} (2a_n - b_n)∑n=1∞(2an−bn)?
222
777
888
Cannot be determined