1. Compute j and express the result in Cartesian form. 2. Compute 12 and express the result in Cartesian form 3. Compute 7ej(4r/")+5e-J5-T/7) and express the result in both Cartesian form and polar form 4. Draw phasor diagrams and express your results in both Cartesian and polar form for the following problems (a) est/4 +e3/4 5. Let 21 =-1+j2 and 22 =-1-3. Evalute the following expressions and express your results in both Cartesian and polar form. (NOTE: 2" is the conjugate of z.) (a) (b) j*z c 22 21 (d) (e) 21112 (f) z1-1 (g) 21 22 (h) 21/22 (i) 2122