Design a helical spring which will fit inside a tube of inside diameter of 25 mm and provide a load of 400 n at a spring height of 65 mm and 240 n at a spring height of 72 mm. your answer should include specifications of (a) the actual spring constant obtained; (b) the required wire diameter, (c) the spring coil diameter; (d) the number of active coils, and (e) the free length of the spring. your design must take into account the following design assumptions: • the ends are squared and ground • the spring will be manufactured from astm a228 cold-drawn steel a clash allowance of 10% should be used • modulus of rigidity of steel is g= 79 gpa the spring is manufactured without presetting.