(Harmonic Mean) Consider three database applications. The fi…

(Harmonic Mean) Consider three database applications. The first application can perform 40 queries per second. The second application can perform 20 queries per second. And the third application can perform 20 queries per second. For a data processing request, the first application will performance 400 queries, the second application will performance 400 queries, and the last application will performance 200 queries. These three applications need to be started one after another, from the first application to the third. What is the average processing rate (queries per second) after all 1000 operations are finished? 

Please give the 16-bit floating point number encoding for th…

Please give the 16-bit floating point number encoding for the following two numbers. To simplify the computation, please use a bias of 7. All numbers are 2-based.    Sign (1bit) Exponent (4bits) Fraction (11bits) 0.11001×10−11:       −1.0011001×1001: