3. (25 points) The figure below shows 4 special processes for a 1mol ideal monatomic gas. Fill in the blanks in the table. The initial volume is 1.0L and the final volumes for path 1,2 and 3 are 1.4L; and the molar heat capacity at constant volume is Cv,m=23R. Please show the detailed calculation processes for each path. And find the general equation to calculate the change in internal energy for all paths