根据下，已知飞机开始飘降时重量为88千磅，ISA+15℃，到改平点时前进的地面距离为500NM，顺风50kt，试计算飘降升限是_______,所需燃油是__________.（注：请注意单位大小写）MAX CONTINUOUS THRUST-|||-Driftdown Speed/Level Off Altitude-|||-100ft/min residual rate of climb-|||-WEIGHT(1000 LB) OPTIMUM LEVEL OFF ALTITUDE (FT)-|||-START DRIFT DOWN +(10)^circ C-|||-DRIFTDOWN LEVELOFF SPEED(KIAS) &BELOW ._(A)+(15)^circ C +(20)^circ C-|||-170 163 257 18500 17000 15200-|||-160 153 250 20400 19100 17300-|||-150 144 242 22400 21100 19600-|||-140 134 235 24400 23300 21900-|||-130 125 226 26400 25400 24200-|||-120 115 218 28500 27600 26400-|||-110 106 209 30500 29700 28700-|||-100 96 199 32500 31800 30900-|||-90 87 189 34600 33900 33000-|||-80 77 178 36900 36200 35400-|||-Driftdown/LRC Cruise Range Capability-|||-Ground to Air Miles ConversionMAX CONTINUOUS THRUST-|||-Driftdown Speed/Level Off Altitude-|||-100ft/min residual rate of climb-|||-WEIGHT(1000 LB) OPTIMUM LEVEL OFF ALTITUDE (FT)-|||-START DRIFT DOWN +(10)^circ C-|||-DRIFTDOWN LEVELOFF SPEED(KIAS) &BELOW ._(A)+(15)^circ C +(20)^circ C-|||-170 163 257 18500 17000 15200-|||-160 153 250 20400 19100 17300-|||-150 144 242 22400 21100 19600-|||-140 134 235 24400 23300 21900-|||-130 125 226 26400 25400 24200-|||-120 115 218 28500 27600 26400-|||-110 106 209 30500 29700 28700-|||-100 96 199 32500 31800 30900-|||-90 87 189 34600 33900 33000-|||-80 77 178 36900 36200 35400-|||-Driftdown/LRC Cruise Range Capability-|||-Ground to Air Miles ConversionMAX CONTINUOUS THRUST-|||-Driftdown Speed/Level Off Altitude-|||-100ft/min residual rate of climb-|||-WEIGHT(1000 LB) OPTIMUM LEVEL OFF ALTITUDE (FT)-|||-START DRIFT DOWN +(10)^circ C-|||-DRIFTDOWN LEVELOFF SPEED(KIAS) &BELOW ._(A)+(15)^circ C +(20)^circ C-|||-170 163 257 18500 17000 15200-|||-160 153 250 20400 19100 17300-|||-150 144 242 22400 21100 19600-|||-140 134 235 24400 23300 21900-|||-130 125 226 26400 25400 24200-|||-120 115 218 28500 27600 26400-|||-110 106 209 30500 29700 28700-|||-100 96 199 32500 31800 30900-|||-90 87 189 34600 33900 33000-|||-80 77 178 36900 36200 35400-|||-Driftdown/LRC Cruise Range Capability-|||-Ground to Air Miles Conversion

根据下，已知飞机开始飘降时重量为88千磅，ISA+15℃，到改平点时前进的地面距离为500NM，顺风50kt，试计算飘降升限是_______,所需燃油是__________.（注：请注意单位大小写）