Answer Happy

Please show AND EXPLAIN all work, I need to understand everypart of the process and I am using this to review. The extrahelp is greatly appreciated and I will upvote as well. Thankyou!
Question 5 (a) What are the characteristics of an ideal op amp? (b). Examine the circuit below 1.5v 2.25 V (+1 5 ΚΩ V₂ 20 ΚΩ Μ 10 ΚΩ 10 ΚΩ www 30 ΚΩ V₁ www 50 ΚΩ 40 ΚΩ www 80 ΚΩ V3 V4 100 ΚΩ 20 ΚΩ να
Calculate the following: (i) V₁ (ii) V₂ (iii) V3 (iv) Vo