Assume the following: - var1 is an integer stored at memory address 768 which is set to 67 - var2 is an integer stored at memory address 896 which is set to 768 - var3 is an integer stored at memory address 912 which is set to 912 What is stored in var4 after each of the following lines of code? 1. int var4=var1+var2; 2. int var4=var3var2; 3. int var4=&var1+var2 4. int var4 = \&var3 - *var3