The teacher will be very surprised to see your correct solution 😉
sum
2*pi + 4*pi
=
6*pi
product
2*pi*4*pi
=
2 8*pi
8*pi^2
x1 = 69.1150383789755
x2 = -50.2654824574367
x3 = 25.1327412287183
x4 = -175.929188601028
x5 = -69.1150383789755
x6 = -81.6814089933346
x7 = 50.2654824574367
x8 = 43.9822971502571
x9 = 87.9645943005142
x10 = -43.9822971502571
x11 = -6.28318530717959
x12 = 81.6814089933346
x13 = -62.8318530717959
x14 = 6.28318530717959
x15 = -43649.2883289766
x16 = -12.5663706143592
x17 = -31.4159265358979
x18 = 62.8318530717959
x19 = -87.9645943005142
x20 = -1840.97329500362
x21 = -25.1327412287183
x22 = 52602.8273917075
x23 = -6440.26493985908
x24 = 1407.43350880823
x25 = 100.530964914873
x26 = 31.4159265358979
x27 = 12.5663706143592
x28 = -100.530964914873
x28 = -100.530964914873