Design a database for a school, with information about students, professors, and other staff. Each person is described by standard personal data. The database has to track of the academic history of students, archiving the classes attended and the final grades earned for each student for every year and subject. Professors can be full-time or adjuncts, and is described by the courses s/he can teach. The database has to manage information about the rooms: there are lecture rooms (associated with classes), labs (associated with subjects), and offices (generically associated with employees) Two species cannot have the same official name, even if the same name can be given to multiple species The E-R schema must include cardinalities for relationships, and attributes (where applicable), and identifiers.

Ajeweler designing a pin has decided to use five stones chosen from diamonds, rubies, and emeralds. in how many ways can the stones be selected?

What must you do before formatting a paragraph?

You will be given two character arrays of the same size, one will contain a number of ships. ships will move around the character array based on which way they are facing and the route they are on. routes are given in the other array. the route consists of '-' and '|' for straight paths, '\' and '/' for curves, and '+' for intersections. there are ships on these routes. ships always face a direction, '^' for up, '> ' for right, 'v' for down, and '< ' for left. any time the ships hit a '\' or a '/' it will turn as you would expect a ship to turn (e.g. a '^' that moves into a '/' will turn right). at an intersection, ships will always continue straight through. all ships move at the same speed, ships take turns moving and all ships move during one 'tick'. the one in the most top left goes first, followed by those to its right, then the ones in the next row. it iterates along the rows and then down the columns. each ship moves one space on its turn moving along the route. your function needs to return the position of the first collision between two ships and the number of ticks before the crash occurred.