(Branch and Bound Algorithm)

Fill the missing parts and examine each of four second level nodes (branch, prune, etc.) with a brief explanation..

x1=1,4 X2=5 UB=200 LB=-60 2=200 x1 1 x1 2 2 *1=0.5 x1=2 X226 UB=? LB=? X2=3.8 UB=? LB=? 2=190 Z=175 2 ? ? ? x1=0 x1=1 x1=2 UB=? LB= ? x2=7.5 x1=3 x2=2.5 UB=? LB=? x2=5 UBE? LBE? x2=5 UB=? LBE? 2-195 2=140 2=170 Z=160 ? ? ? ? x1=1,4 X2=5 UB=200 LB=-60 2=200 x1 1 x1 2 2 *1=0.5 x1=2 X226 UB=? LB=? X2=3.8 UB=? LB=? 2=190 Z=175 2 ? ? ? x1=0 x1=1 x1=2 UB=? LB= ? x2=7.5 x1=3 x2=2.5 UB=? LB=? x2=5 UBE? LBE? x2=5 UB=? LBE? 2-195 2=140 2=170 Z=160