CREATE TABLE table_51777 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" FLOAT)

What is the week for Result of w 28-17?
SELECT "Week" FROM table_51777 WHERE "Result" = 'w 28-17'
SELECT "Week" FROM "table_51777" WHERE "Result" = 'w 28-17'