The wind chill factor represents the equivalent air temperature at a standard wind speed that would produce the same heat loss as the given temperature and wind speed. One formula for computing the equivalent temperature is

𝑑
W(t) = {33 βˆ’ (10.45+10βˆšπ‘£βˆ’π‘£)(33βˆ’π‘‘) / 2204
33 βˆ’ 1.5958(33 βˆ’ 𝑑)

if 0 ≀ v < 1.79
if 1.79 ≀ v < 20
if v β‰₯ 20

where v represents the wind speed (in meters per second) and t represents the air temperature . Compute the wind chill for an air temperature of 15Β°C and a wind speed of 12 meters per second. (Round the answer to one decimal place.) Show your work.