if /** *Problem 18 Write a method that accepts a large string. This method will return true * the string starts with or ends with the word "Java". This word can be any * variation with uppercase or lowercase letters. * * * java Java jAva java javA JAva Java JavA jAVa jAVA jaVA JAVA JAVA JAVA JAVA are all of the possibilities. */ * public boolean Problem18 (String phrase) { // Your code here return false;

1) Introduction to cryptography subject fast please

1. (3 points) Convert (137)10 to ( ) 16- Show your work to receive credit.

6:38 A el e "L(43 Edit 1. For statements p.g and r, use a truth table to show that each of the following pairs of statements is logically equivalent. a. (p Aq)ep and pq. b. p-(g vr) and -q-(-p vr). c. (p vg)-r and (pq) A(g-r). d. p-(g vr) and (-r)-(pg). e. p-(g vr) and ((-r) Ap)-q. 2. For statements p.g, and r, show that the following compound statements are tautology. a. p-(p vg). b. (p A(p-q))q. 11 c. ((p-q) A(q-r))-(pr). 3. For statements p and q, show that (p A-q) A(p ng) is a contradiction. 4. Write the contrapositive and the converse of the following conditional statements. a. If it is cold, then the lake is frozen. b. If Solomon is healthy, then he is happy. c. If it rains, Tigist does not take a walk. 5. Let p and q be statements. Which of the following implies that p vq is false? a. -p V-q is false. b. -p Vq is true. c. -p A-q is true. d. pq is true. e. p Aq is false. 6. Suppose that the statements p.g.r, and s are assigned the truth values T,F,F, and T, respectively. Find the…

5

A light-year is a unit of astronomical distance that measures how far light can travel in one year, defined as 365.25 days, which is about 9.4507 * 10^12, or about 5.878 trillion miles. A parsec is a unit of astronomical distance, equal to about 3.26 light-years. One parsec corresponds to the distance at which the mean radius of the Earth's orbit subtends an angle of one second of arc. Since the numbers grow so large so quickly, it's often easier for astronomers to work with parsecs, and convert them back to light years, or even miles, when needed.  Write a function to convert parsecs to light-years. (computer language: C)

3. An unnamed faculty uses three screens on his desk. One measures 1920 x 1080 pixels and the other two measure 1280 x 1024 pixels. a. Create variables for height and width (in pixels) for each of these displays and set these variables equal to their respective measures. b. Determine the total number of pixels across the three displays. This numerical answer should be represented by a variable. c. If each pixel were to draw 1.2e-5 watts, create a variable for this value and determine the wattage required to activate all the pixels across all three screens at once. This numerical answer should be represented by a variable.

fig 8.3 incldued

Can you help please , this needs to be solve in excel , can u show the formulas and steps thank you