Welcome dear expert $,$can you solve this for me with explain :

Question $1-$ What is the decimal number that is equavalant to $(1110{)}_2?$

Question $2-$ What is the binary number that is equavalant to $(19){?}_{10}?$

Question $3-$ What is the sum of the $(01111{)}_2+(11010{)}_2$ in binary number system?

Question $4-$ Simplify the boolean function $f(w,x,y,z)={\displaystyle \underset{?}{\overset{?}{}}}(0,1,4,5)$

Question $5-$ Simplify the boolean function $f(w,x,y,z)={\displaystyle \underset{?}{\overset{?}{}}}(0,2,4,5,6,7,8,12)$