please show all the workings. And solve everything correctly. SHOW ALL WORKINGS IT IS OF UTTEMOST IMPORTANCE. 

answer question 1,2,3,4,6

for question 3: these r the TA names 

Alexandra Liaskovski-Balaba    
Bin Wei                        
Brian Grickites            
Graydon Haskins     
Jeong Won Kim                 
Omar Garcia Flores             
Sania Hamid               
Simon Krol            
Thompson Stubbs             
Yin Leng                       yinleng@cmail.carleton.ca