help me solve these questions please

1. Convert 955.8mL to liters. 2. Raising units to a desired power: When Krakatau exploded in 1883 , it released 4.3 cubic miles of debris into the atmosphere. Convert this volume to cubic meters. (1km=0.6214mi) 3. Using density as a conversion factor: The density of ethanol is 0.789g/mL. What is the volume of ethanol in a 15.0g sample? 4. In an experiment similar to yours, a student obtains the following volumes using a 5.00mL volumetric pipet: 4.995mL,5.011mL, and 5.023mL. Determine the percent error, standard deviation, and the relative standard deviation