Find the First Term and the Common Difference $$\frac { 7 } { 12 } , \frac { 1 } { 3 } , \frac { 1 } { 12 } , - \frac { 1 } { 6 } , \ldots$$

Multiple Choice

Find the first term and the common difference.
- $$\frac { 7 } { 12 } , \frac { 1 } { 3 } , \frac { 1 } { 12 } , - \frac { 1 } { 6 } , \ldots$$

A) $\mathrm { a } _ { 1 } = \frac { 7 } { 12 } , \mathrm {~d} = \frac { 1 } { 4 }$
B) $\mathrm { a } _ { 1 } = \frac { 7 } { 12 } , \mathrm {~d} = - \frac { 1 } { 4 }$
C) $a _ { 1 } = \frac { 7 } { 12 } , \mathrm {~d} = \frac { 7 } { 12 }$
D) $\mathrm { a } _ { 1 } = \frac { 7 } { 12 } , \mathrm {~d} = - \frac { 3 } { 4 }$