4.22 [5]<§4.3> You are going to enhance a computer, and thereare two possible improvements:either make multiply instructions run four times faster

than before, or make memory access instructions run two times fasterthan

before. Yourepeatedly run a program that takes 100 seconds to execute. Ofthis

time, 20% isused for multiplication, 50% for memory access instructions, and

30% for othertasks. What will the speedup be if you improve onlymultiplication?

What will thespeedup be if you improve only memory access? What will

the speedup beif both improvements are made?

4.23

[5]<§4.3> You are going to change the program described inExercise so

that thepercentages are not 20%, 50%, and 30% anymore. Assuming thatnone

of the newpercentages is 0, what sort of program would result in a tie(with

regard tospeedup) between the two individual improvements? Provide botha

formula and someexamples.

In this lab, you complete a prewritten c++ program for a carpenter who creates personalized house signs. the program is supposed to compute the price of any sign a customer orders, based on the following facts: the charge for all signs is a minimum of $35.00. the first five letters or numbers are included in the minimum charge; there is a $4 charge for each additional character. if the sign is made of oak, add $20.00. no charge is added for pine. black or white characters are included in the minimum charge; there is an additional $15 charge for gold-leaf lettering. instructions ensure the file named housesign.cppis open in the code editor. you need to declare variables for the following, and initialize them where specified: a variable for the cost of the sign initialized to 0.00 (charge). a variable for the number of characters initialized to 8 (numchars). a variable for the color of the characters initialized to "gold" (color). a variable for the wood type initialized to "oak" (woodtype). write the rest of the program using assignment statements and ifstatements as appropriate. the output statements are written for you. execute the program by clicking the run button. your output should be: the charge for this sign is $82. this is the code, // housesign.cpp - this program calculates prices for custom made signs. #include #include using namespace std; int main() { // this is the work done in the housekeeping() function // declare and initialize variables here // charge for this sign // color of characters in sign // number of characters in sign // type of wood // this is the work done in the detailloop() function // write assignment and if statements here // this is the work done in the endofjob() function // output charge for this sign cout < < "the charge for this sign is $" < < charge < < endl; return(0); }

Write lines of verse that rhyme to remember the following information: acid rain is a type of air pollution caused by chemicals in the air.

Acomputer has a two-level cache. suppose that 60% of the memory references hit on the first level cache, 35% hit on the second level, and 5% miss. the access times are 5 nsec, 15 nsec, and 60 nsec, respectively, where the times for the level 2 cache and memory start counting at the moment it is known that they are needed (e.g., a level 2 cache access does not even start until the level 1 cache miss occurs). what is the average access time?