How would I write the sample calculations using measurements for 7% solution

3. Include sample calculations, using measurements for 7% solution. a) Part I-Concentration (in %m/m ) of 7% solution b) Part II - Density of 7% solution %(m/m)=masssolutionmasssolute100% where: mass solute = mass of solid NaCl; mass solution = mass of solute + mass of deionized water. Procedure Preparation of the solutions of NaCl and determine their densities. To prepare about 20mL solution of about 7%NaCl. - Weigh a dry and pre-weighed 50mL beaker, record the mass. - Weigh about 1.5g of the salt into the dry and pre-weighed 50mL beaker, record the mass and add 20mL of deionized water to the flask. - Record the total mass of beaker: salt and water. - Stir the mixture with a dry stirring rod until the salt is completelv dissolved, before proceeding to next step. Determine the density of the solution following the same procedure from experiment 1, being sure to rinse the pipette twice with some of the prepared salt solution before pipetting. - Wipe the outside of the pipette dry before pipetting the next sample. - Clean the pipette after each use