Let z1 = -2 + 1li, z2 =2 - i. Showing the details of your work, find, in the form x + iy: 8. Z172, ( 2122 ) 9. Re (z1), (Rez]) 10. Re (1/z2), 1/Re (z2) 11. (z1 - Z2) /16, (z1/4 - z2/4) 12. z1/Z2, Z2/Z1 13. (z1 + z2)(21 - Z2), 2 - Z