My teacher informed me that my 4 D was incorrect please help

4. Convert the following using the conversion factors provided, don't forget the units as part of your answer. (1 pt each for 4 pts total) a) 345.23 m/min to ft/sec 18.88. ft/sec b) 256.98 N/m2 to lb/ft2 5.37 lb/ft2 c) 236.3 km/hr to miles/hr 146.83001 miles/hr d) 36.57 psi to mm Hg 74.457276 mm Hg