QUESTION 2 The information below relates to the production data of Phalaborwa Ltd that manufactures a specialized equipment for the mining industry. 2017 2018 2019 2020 Production 154 000 170 000 215 000 223 000 overhead (R) Production 105 90 130 150 volume (units) Required: a) Use the high-low technique and formulate a cost equation for estimating production overheads in 2021 b) Apply the least squares method of linear regression and formulate a cost equation for estimating production overheads in 2021. The equations below might assist in this task: Y= a +bx1 + b2x2.. 2y = Na +bEx Exy = ax + bx2