If you could answer both, I'd appreciate it.

What is the solution of the system of linear equations 8x + 10y + 9z = 4 9x + 9y + 7z = 2 O a. ( t, 1.89 + 0.61t, 1.11 - 0.15t), t from negative infinity to positive infinity O b. ( -0.89 + -7.26t , t), t from negative infinity to positive infinity O c. ( -0.89, 1.11 , 7) O d. There are no solutions O e. ( 0.65 + 0.61t, 2.89 - 1.39t , t) O f. ( -0.89 + 0.61t, 1.11 - 1.39t , t), t from negative infinity to positive infinityConsider the following system of linear equations 13.5x + 14.8y = 10.7 12.5x+9.8y = 4.3. What is the elementary row operation needed to make the first entry in row 2 equal to zero? O a. R2 = -5.5R1 + 8.5R2 O b. R1 = R1 - R2 O c. R2 = R1 - R2 O d. R2 = 12.5R1 + 13.5R2 O e. R1 = 12.5R1 + 13.5R2 O f. R2 = 12.5R1 - 13.5R2