need in detail with explaination please and thank you

1. Create a K-map for the function f(x1,x2,x3,x4)=x1x2x4+x2x3x4+x1x2x3+x1x2x3x4+x1x2x3x4 2. Find the simplest SOP expression using K-Maps for the following functions. List allprime implicants found in the K-Map and list only the essential prime implicants. Then list the simplest SOP equation. i. f(x1,x2,x3)=m(0,4,5,7) ii. f(x1,x2,x3,x4)=m(3,4,5,7,9,11,13,15)