What substance was the first photograph made from?

Apython programming question: assume s is a string of lower case characters. write a program that prints the number of times the string 'bob' occurs in s. for example, if s = 'azcbobobegghakl', then your program should print number of times bob occurs is: 2

Which is the highest level of the hierarchy of needs model? a. humanity b. intrapersonal c. team d. interpersonal

To check whether your writing is clear , you can