PPlease address these questions with precision

A marketing consultant was commissioned to conduct a questionnaire survey of the clients of a financial company. The total number of respondents was 650, of whom 220 had investments above a specified threshold. (i) Each respondent who had investments above the threshold was asked about the percentage of these investments that was held in the form of a certain type of trust. The respondents answered by ticking appropriate boxes and the results led to the following frequency distribution. percentage 50 frequency 22 76 73 49 (a) Present these data graphically using a carefully drawn histogram. (b) Calculate the mean percentage for the full set of 220 such respondents, assuming that the frequencies in each category are uniformly spread over the corresponding range. [5] (ii) Calculate a 95%% confidence interval for the percentage of such investors who would have investments above the threshold. [4] The same respondents with investments referred to in part (i) were also asked to specify their satisfaction with the current return received from their full portfolio of investment. This was in the form of a four-point qualitative scale: very satisfied, quite satisfied, a little disappointed, very disappointed The following two-way table of frequencies was obtained. percentage in type of trust