here from the table we get there are 4 participants who have selected image 1, 3 participants who have selected image 2, 5 participants who have selected image 3, 6 participants who have selected image 4 and 3 participants who have selected image 5
So the frequency table will be
Image Frequency
1 4
2 3
3 5
4 6
5 3
Since indecisive associated with the images 3 and 5 and there are 5 participants and 3 participants who have selected images 3 and 5 respectively
So there are 3+5=8 participants who selected an image associated with being indecisisve.