Write a function named beginswith() that computes how many strings in a list of strings begin with
a specified letter.
the function beginswith() takes two parameters:
1. letter, a string of length 1
2. strlist, a list of 0 or more strings
the function beginswith() should return an integer that is the number of strings in strlist that begin
with letter.

George heard about the benefits of a data warehouse. he wants to try implementing one for his organization. however, he is afraid that transferring data to the data warehouse will affect transaction time. which element ensures that transactions are not affected when moving data to a warehouse? when data is transferred to a data warehouse, the a area frees the source system to continue transaction processing.