Secure Hash algorithms, such as SHA-1, send encrypted Hash. This Hash can be used to confirm that the data was not tampered with or to confirm the identity of the sender (such as in Digital Signatures). In order to use this Hash as a Digital Signature a. the encryption key used must be generated at both ends of communications independently without transmitting it ever. b. the encryption key must be the private key of the sender. c. only the sender and the receiver should know the encryption key. d. only the administrator should know the encryption key.

Write a program that will compute the volume of ice cream served in a cone. as you can see in the diagram below, the ice cream is served as a hemisphere of frozen deliciousness on top of a cone, which is also packed with frozen deliciousness. thus, the total volume of ice cream sold is the volume of the hemisphere plus the volume of the cone. the example shows an ice cream cone in which the hemisphere and cone have a radius of 10 inches and the cone has a height of 15 inches. your program must instead prompt for these two values, which are taken from the keyboard as integers: • the hemisphere/cone radius in inches, and