Select the correct statement(s) regarding SMF and MMF fiber optic cables. a. multimode fiber (MMF) has a wider core diameter that supports multiple modes of light; as such, MMF can support higher data capacities compared to single-mode fiber (SMF)
b. MMF suffers from modal delay, which results in digital signal distortion
c. SMF cables are constructed with a small optical core, which means its data capacity is much less than MMF fiber which have a larger diameter core
d. all are correct statements

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)?