4). Recall that you are on the board of trustees for a Michigan township that frequently experiences winter temperatures of -16 C. You are responsible for ensuring that the citys 30,000 residents are able to travel safely in even the coldest and iciest conditions. You must decide if the city purchases the pre-prepared blend or proposes a new blend for use in winter 2021. You must consider environmental impact, lowest effective temperature, cost, and your experimental results in your decision. Of note, the preprepared blend would simplify logistics for the city, but the companys price includes a $5/ton mixing fee; if you create your own blend, the cost would simply be calculated from the 2020 projected prices of pure compounds in Tabe 2.1 (of your lab manual).

a). (5 points) Based on your experimental results, would you recommend the city purchase the pre-prepared blend or change the percent composition of blended ice melt? Defend your choice using experimental data.

b). (4 points) If a change is recommended, list your new formulation, an approximate price, and why this blend would be an improvement from the pre-prepared ice melt.