By Mfonobong Nsehe Ashish J. Thakkar is the CEO of Mara Group a diversified conglomerate with approximately $100 million in revenues. Ashish who started business at age 14 has parlayed a small computer trading operation into a pan-African conglomerate, earned a fortune and attained rock star status along the way. Ashish J. Thakkar is only 30, but in less than two…