Write a function with declaration void minusoddcolumn(int** mat, int n) where n ≥ 1 and mat is an n × n 2d-array of non-negative integers. the function should find the column in mat with more odd numbers and replace all of its elements with -1. if multiple columns have the highest presence of odd numbers, the first of them (i. e. the one with the lowest index) should be chosen to have its elements replaced by -1

An external consultant recommends that a plant installs a bank of capacitors for power factor correction. this will reduce the peak electrical demand charges by an average of 93 kw every month. the plant current pays $13 per kw in peak demand charges. the capacitor bank will include 223 kw of fixed capacitors, and 183 of variable capacitors. the fixed capacitors cost $59 per kw, and the variable capacitors will cost $65 per kw. the consultant charges 21% of the equipment costs to install the capacitors. because this project will reduce the demand for the electric utility, they are prepared to provide a one-time rebate of $42 per kw of reduced demand. what is the simple payback period for this project (in years)?