7 (a) The pie chart summarises the results of a local election. (i) Candidate B received 1600 votes. Work out the total number of people who voted in the election. (ii) What fraction of the vote did candidate D receive? Give your answer in its lowest terms. (iii) How many more votes than candidate A did candidate C receive? (b) The table summarises the ages of the members of a film club. (i) Calculate an estimate of the mean age of the members. (ii) On the grid below, draw a histogram to represent this data. (iii) Find an estimate for the number of members of the film club who are over 50.