Using the following data

1. CU3+ + 2e- ---> Cu+ E1= 1.28V

2. CU2+ + e- ---> Cu+ E2= 0.15V

3. Cu2+ + 2e- ----> Cu(s) E3= 0.34V

3. Cu+ + e- ----> Cu (s) E4= 0.52V

calculate the standard reduction potential for the reaction of Cu(III) to Cu(II).

Is it .783 V?