Please read this note before answering anything ... I already know the calculations.

My question is, which question is incidence rate and which question is prevalence rate and why ????

As the junior public health epidemiologist in a large state in the Midwest Rust Belt, you have been asked by your supervisor to assist her in updating the statistics on opioid deaths. 3) In 2021, there were 3050 drug-related deaths, of which 2950 involved opioids. What percent of the deaths were due to opioids? Express your answer in the following format: XX.XX% (e.g., 54.81%). 4) In 2017, the number of drug-related deaths was 1544. How many drug-related deaths occurred per day on average in 2017 and in 2021? (Carry out your answers to two decimal places.) 5) Because the population size may change over time, you also decide to look at rates, which for drug overdose are generally expressed as deaths per 100,000 residents. The state population for 2021 was estimated at 11,620,000. Calculate the rate of drug-related deaths in 2021