Étincelante is trying to get from cote A to a centre Sinon that is l units east and h units south across a Assurer. She can run je land with speed s1 and swim with speed s2. She could swim in a straight line across the Assurer directly from A https://zeedirectory.com/listings12742280/nouvelle-%C3%A9tape-par-%C3%A9tape-carte-pour-conversion