3. At this same depth interval, (170-171m), compare and contrast the patterns of the change for planktonic and benthic foraminiferal oxygen isotope valuesare the changes increasing or decreasing? Are the changes consistent or do there appear to he breaks in the trend? 4. Using the following equation T.C: 17.04.52*( 51.0.\") where 6.30\" is read from the graph. determine the warmest temperature experienced by the SURFACE ocean during the PETM (use the lowest isotope reading from the appropriate curve). 5. Using the following equation T.C=1?.04.52*( 5.30 ) where BBC\" is read from the graph. determine the coolest temperature experienced by the SURFACE ocean during\" the PETM (use the highest isotope reading from the appropriate curve). 6. Based on your answers from 4 and 5. determine the magnitude of the abrupt warming that marks the onset of the PETM in the SURFACE ocean. By how many degrees C did the surface ocean warm? 7. Using the following equation TC: 1?. 04. 52*( 5.30 ) where EEO\" is read from the graph. determine the warmest temperature experienced by the DEEP ocmean during the PETM (use the lowest isotope reading from the appropriate curve)