Refer to the data below and answer the ques ons that follow.

IMS Pvt. Ltd. organized an annual picnic for which all its staff members had to register their responses (on day 1) as ‘Yes’ or ‘No’ i.e. whether they did/ did not want to a end the picnic. The staff members were allowed to change their responses (i.e., from ‘Yes’ to ‘No’ or from ‘No’ to ‘Yes’) if they wished to change their responses. However, they could change their responses only once on day 2. The following bar chart gives informa on about the responses of the staff from 4 different regions where IMS runs its opera ons. The total number of staff members in each of Mumbai and Aurangabad regions was 800 while that in Pune and Nagpur was 600 and 700 respectively. For Mumbai, Pune, Nagpur and Aurangabad; out of the staff who responded as ‘Yes’ on day 1; percentage of the staff who changed their responses to ‘No’ on day 2 is 60%, 50%, 70% and 60% respectively