Find A_n and A₆ for the Following Arithmetic Sequence $$\mathrm { a } _ { 18 } = - 55 \mathrm { x } + 4 , \mathrm { a } _ { 20 } = - 53 \mathrm { x } + 10$$

Multiple Choice

Find a_n and a₆ for the following arithmetic sequence.
- $$\mathrm { a } _ { 18 } = - 55 \mathrm { x } + 4 , \mathrm { a } _ { 20 } = - 53 \mathrm { x } + 10$$

A) $a _ { n } = ( - 72 - n ) x - 47 - 3 n , a _ { 6 } = - 78 x - 65$
B) $a _ { n } = ( - 73 + n ) x - 50 + 3 n , a _ { 6 } = - 67 x - 32$
C) $a _ { n } = ( - 72 + n ) x - 44 + 3 n , a _ { 6 } = - 66 x - 62$
D) $a _ { n } = ( - 72 + n ) x - 47 + 3 n , a _ { 6 } = - 66 x - 29$