Please help me understand this better. ( Handwriting preferred )

4. Given the vectors a = -1 . b - 8 and c - [s .. a. Is there a linear combination of a and c that would produce the vector u = -3|? (3) 4 continued. Given the vectors a : b. Is there a linear combination of a and c that would produce the vector v = ? What about a linear combination of a, b and c? (4) c. What is the geometric interpretation of the results in parts a and b? (2)