Historically, about ​53% of the population of a certain country believed that the​ planet's temperature was rising​ ("global warming"). A March 2010 poll wanted to determine whether this proportion had changed. The poll interviewed adults in the​ population, and said they believed that global warming was real.​ (Assume these adults represented a simple random​ sample.) Required:
a. What percentage in the sample believed global warming was real in 2010?
b. Is this more or less than the historical 57%?