Six vectors, a→ through f→ have the magnitudes

Six vectors, a^{^→} through f^{^→} have the magnitudes and directions indicated in the figure. Which of the following statements is true?

1. b^{^→} + c^{^→} = f^{^→}
2. d^{^→} + c^{^→} = f^{^→}
3. d^{^→} + e^{^→} = f^{^→}
4. b^{^→} + e^{^→} = f^{^→}

Using the law of vector addition, ( d^{^→} + e^{^→} ) is as shown in the fig.

∴ d^{^→} + e^{^→} = f^{^→}