What is a good angle for a handicap ramp and a formula for steps?

We are moving into a new to us mobile home. The steps we have are too short to comfortably step in the front door. We have nothing at the back door. I need an eat on area plus steps and a ramp for access.
We are 71 and 79.
The table is 36" square with 4 chairs. I also have 2 rocking chairs I'd love for sitting out in the evenings.
The home sits on an incline so one end is just 2 feet above the ground while the other end is almost 4 feet off the ground. So we need formulas for comfortable access. The ramp will start at the end that is 2' off the ground while the steps will be at 3'. The deck will then go past the front door.

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