PLEASE, I need to paraphrase this ASAP

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Firms often must decide between alternatives that are mutually exclusive, cost different amounts, have different useful lives, and require replacement once their productive lives run out. In such cases, using the traditional NPV (single life analysis) as the evaluation criterion can lead to incorrect decisions, since the cash flows will change once replacement occurs. Under the NPV approach, such mutually exclusive projects with unequal lives can be analyzed by using one of the following two modified approaches: 1. We find a common point (lowest common multiple) at which both projects will require replacement at the same time. For example, if Project A lasts for 3 years, while Project B for 4 years; the common point would be year 12, with 4 repetitions of A and 3 repetitions of B. We calculate the required number of NPVs i.e. 4 for A and 3 for B, and then calculate the PV at time 0 of all the future NPVs, choosing the one with the highest total NPV (Replacement Chain Method). 2. We simply convert each project's NPV into an Equivalent Annual Annuity (EAA) as shown in Equation below, by using the PV of an annuity equation or calculator function and choose the one with the higher EAA