<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def calc_horizontal_infrared(sky_cover, dry_bulb, dew_point):
 """Calculate horizontal infrared radiation intensity. See EnergyPlus Enrineering Reference for more information: https://bigladdersoftware.com/epx/docs/8-9/engineering-reference/climate-calculations.html#sky-radiation-modeling Note: [1] Walton, G. N. 1983. Thermal Analysis Research Program Reference Manual. NBSSIR 83-2655. National Bureau of Standards, p. 21. [2] Clark, G. and C. Allen, “The Estimation of Atmospheric Radiation for Clear and Cloudy Skies,” Proceedings 2nd National Passive Solar Conference (AS/ISES), 1978, pp. 675-678. Args: sky_cover: A float value between 0 and 10 that represents the opaque sky cover in tenths (0 = clear; 10 = completely overcast) dry_bulb: A float value that represents the dry bulb temperature in degrees C. dew_point: A float value that represents the dew point temperature in degrees C. Returns: horiz_ir: A horizontal infrared radiation intensity value in W/m2. """

    # stefan-boltzmann constant
    SIGMA = 5.6697e-8

    # convert to kelvin
    db_k = dry_bulb + 273.15
    dp_k = dew_point + 273.15

    # calculate sky emissivity and horizontal ir
    sky_emiss = (0.787 + (0.764 * math.log(dp_k / 273.15))) * \
        (1 + (0.022 * sky_cover) - (0.0035 * (sky_cover ** 2)) +
         (0.00028 * (sky_cover ** 3)))
    horiz_ir = sky_emiss * SIGMA * (db_k ** 4)
    return horiz_ir