If I could get an explanation on this that would be great!

3. (5 pts) A steady, three-dimensional velocity field is given by = 0.657 + 1.73 + 0.948 + = 2.61 + + 1.91 + = 4.21 1.89 a) Calculate constants , , and such that the flow field is irrotational. b) Is it possible that this flow is incompressible? Show why or why not?

(5 pts) A steady, three-dimensional velocity field is given by u=0.657+1.73x+0.948y+azv=2.61+cx+1.91y+bzw=4.21x1.89y a) Calculate constants a,b, and c such that the flow field is irrotational. 0) Is it possible that this flow is incompressible? Show why or why not