20 points. Show work please and thank you

Can someone 50 first drop menu 0.80 or 0.75 or 1.20 or 4.00 second drop menu 4.00 or 0.75 or 0.25 or 3.75 3rd 15,6,10, or 9 4th yes or no

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cot of 61.6