no 5 sama 6.................................

5.
a. c = a + b
= ( 2+4 -3+1 )
= ( 6 -2 )
b.
|a| = √(2² + (-3)²) = √(4+9) = √13
|b| = √(4²+1²) = √(16+1) = √17
|c| = √(6²+(-2)² = √(36+4)= √40= 2√10


6.
a. u-v = ( 2-15 8-(-8) )
= ( -13 16 )
b. |u| = √(2²+8²) = √(4+64) = √70
c. |v| = √(15²+(-8)²)
= √(225+64)
= √289 = 17